Crown IQ-MC4 Reference Manual

Telephone: 574-294-8000. Fax: 574-294-8329. Trademark Notice: IQ2, SmartAmp and PIP are trademarks. Crown and IQ System are registered trademarks of Crown International. Other trademarks are the property of their respective owners. Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8200. Note: The information provided in this manual was deemed accurate as of the publication date. How- ever, updates to this information may have occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com. Printed on Printed on Printed on Printed on Printed on recycled paper. recycled paper. recycled paper. recycled paper. recycled paper. IQ-MC8 & IQ-MC4 - MC Modules

SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE! FCC COMPLIANCE NOTICE This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. CAUTION: Changes or modifications not expressly approved by the party responsible for complicance could void the user’s authority to operate the euqipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. The information furnished in this manual does not include all of the de- tails of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, op- eration or maintenance. If you need special assistance beyond the scope of this manual, please contact Crown Technical Support. Crown Technical Support 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A. Phone: 800-342-6939 (North America, Puerto Rico and Virgin Islands) or 574-294-8200 Fax:574-294-8301 Internet:http://www.crownaudio.com

1718 W. Mishawaka Rd. 574-294-8289 Elkhart, IN 46517 U.S.A. [email protected] European Representative’s Name and Address: Nick Owen 19 Clos Nant Coslech Pontprennau Cardiff CF23 8ND United Kingdom Equipment Type: Control System Components Family Name: IQ Series Model Name: EMC Standards: EN 55103-1:1995 Electromagnetic Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions EN 55103-1:1995 Magnetic Field Emissions-Annex A @ 10 cm and 1 M EN 61000-3-3:1995 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current ≤16A EN 55022:1992 + A1:1995 & A2:1997 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class B EN 55103-2:1996 Electromagnetic Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity EN 61000-4-2:1995 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge) EN 61000-4-3:1996 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A) EN 61000-4-4:1995 Electrical Fast Transient/Burst Immunity (Criteria B) EN 61000-4-5:1995 Surge Immunity (Criteria B) EN 61000-4-6:1996 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A) EN 61000-4-11:1994 Voltage Dips, Short Interruptions and Voltage Variation Safety Standard: EN 60065: 1998 Safety Requirements – Audio Video and Similar Electronic Apparatus I certify that the product identified above conforms to the requirements of the EMI Council Directive 89/335/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC. Signed Date of issue: March 24, 2004 Larry Coburn Title: Senior Vice President of Manufacturing IQ-MC4, IQ-MC8 DECLARATION OF CONFORMITY

2 Controls, Connectors & Indicators 6 3 Installation ........................... 7 3.1 Prepare the MC-IQ Module ................... 7 3.2 Install the Wiring ................................... 8 3.3 Adjust System Levels .......................... 10 4 Operation .............................11 4.1 Hardware ............................................. 11 4.1.1 Data Signal Presence Indicator .... 11 4.1.2 Preset Indicator ........................... 11 4.1.3 IQ Bus Input Connector ............... 11 4.1.4 IQ Bus Daisy Output Connector......................... 11 4.1.5 Aux Input/Output and Listen Bus Connector ................... 11 4.1.6 IQ Bus “Drop Out” Relays ............ 12 4.2 Hardware Controls .............................. 12 4.2.1 IQ Address Switch (S1) ............... 12 4.2.2 Reset/Preset Switch..................... 12 4.3 Amplifier Control and Monitoring........ 13 4.3.1 User Presets ............................... 13 4.3.2 Clip Monitor ............................... 13 4.3.3 Input Signal Level Monitor .......... 13 4.3.4 Output Signal Level Monitor ........ 13 4.3.5 Thermal Headroom Level Monitor ............................. 13 4.3.6 Ready/Standby Control ............... 14 4.3.7 Signal Mute ................................ 14 4.3.8 Polarity Inverter........................... 14 4.3.9 Input Signal Attenuator ................ 14 4.3.10 “Ghost Faders”.......................... 14 4.3.11 Amp Information ....................... 14 4.3.12 Amp Mode ................................ 14 4.3.13 Error Reporting ......................... 14 4.4 Signal Processing ............................... 15 4.4.1 Input Signal Compressor/Limiter .................... 15 4.4.2 Peak Voltage Limiter ................... 15 4.4.3 Average Power Limiter................. 15 4.5 Load Supervision ................................ 16 5 IQ Audio In Depth ...................17 5.1 A Closer Look at IQ Bus Wiring ........... 17 5.2 Using the AUX Connector.................... 18 5.2.1 AUX Output ................................ 19 5.2.2 AUX Input ................................... 20 5.3 Listen Bus ........................................... 20 5.4 Working with RJ-11 and RJ-45 Connectors ............................................... 20 5.5 Load Supervision ................................ 21 5.5.1 Typical Load Characteristics to Know and Understand ............. 22 6 Specifications .......................23 7 IQ Address Tables ...................24 8 Service................................28 Warranty ................................29 Content

1 Welcome The IQ-MC4 and IQ-MC8 modules connect CTs 4200 and CTs 8200 am- plifiers to the IQ Bus of an IQ Sys- tem ®, allowing the amplifier to be controlled and monitored via IQ. The IQ-MC module is an IQ2™ series component. This means it supports Crown’s IQ2 protocol and requires an IQ System with an IQ2 -compatible IQ interface. IQ2 (universal code) en- ables users and third parties to de- velop custom software objects to con- trol and monitor IQ2 compatible com- ponents like the IQ-MC module. Each IQ-MC module includes an IQ address switch allowing the unit to have a unique address on the IQ Bus. It is powered by the amplifier and includes a memory backup feature that enables the amplifier to resume operation with all of its settings intact after a power outage. We strongly recommend you read all the instructions, warnings and cau- tions contained within. Also, for your protection, please send in the war- ranty registration card today and save the bill of sale since it is your official proof of purchase.

IQ BUS AUX IQ ADDRESS LISTEN BUS PRESET OUT IN DATA 1 2 4 8 16 32 64 128 IQ Bus Output Connector IQ Bus Input Connector AUX Input/Output and Listen Bus Connector Reset/Preset Switch Preset Indicator Data Indicator IQ Address Switch (S1) Figure 2.1 IQ-MC8 Controls, Connectors and Indicators

value which doubles as the switch number increases. For example switch 1 has a value of 1; switch 2 has a value of 2; switch 3 has a value of 4; switch 4 has a value of 8 and so on. 3 Installation 3.1 Prepare the IQ-MC Module First, turn off and unplug the amplifier. Set the IQ address switch S1. By giving each IQ component a unique address, it can be individually con- trolled and monitored. Whenever the IQ System wants to send a command to just one IQ component, it first sends its address and then the command down the IQ Bus. S1 has eight segments because it actually contains eight tiny switches inside. The word “ON” is printed on the switch along its lower left side to indicate the ON position and the switches are numbered along the bottom (Figure 3.1). The address is determined by adding the values of all “ON” switches. In Figure 3.1, switches 1, 3, 4 and 7 are on. Simply add the values to find the address: 1+4+8+64=77. A convenient series of IQ address tables are included in Section 6. The tables show the switch settings for all 250 addresses. No two IQ components of the same type which are connected to the same IQ Bus can have the same address.* Suppose, for example, an IQ System has two IQ Bus loops, 1 and 2, and this IQ-MC module is to be installed into loop 1 and given an address of 77. No other IQ-MC modules can be given the same address in loop 1. However, an IQ-MC module in loop 2 can have the same address. Different IQ components in the same IQ Bus loop can have the same ad- dress. For example, both an IQ–USM 810 mixer/processor and an IQ-MC module can use address 77 in the same loop. A valid IQ address is any number from 1 to 250. Do not use a number higher than 250 since they are reserved for special use. An address of “0” (zero) should only be used for “stand alone” mode. Setting the address switch to “0” disables the IQ Bus port. 1 2 4 8 16 32 64 128 VALUE 1 2 3 4 5 6 7 8 ON SW1 Figure 3.1 Address Switch (S1) * Note: All IQ PIP™ modules (IQ-PIP-USP2, IQ-PIP-MEM, IQ-PIP-SMT, etc.) are consid- ered the same type, and so may not share the same address on the same IQ Bus.

Connect the IQ-MC module to the IQ system via the IQ Bus. The IQ compo- nents in a IQ Bus loop are wired sequentially. The loop begins and ends with the IQ interface. The output of one IQ component “loops” to the input of the next and so on as shown in Figure 3.2. There are three different types of con- nectors used for IQ Bus wiring on IQ components. These include DIN con- nectors, screw terminal plugs, and RJ-45 connectors. The IQ-MC uses RJ-45 connectors that accept stan- dard RJ-45 plugs like the one shown in Figure 3.6, allowing the use of in- dustry-standard straight-thru type network cables. The right RJ-45 con- nector is used for input and the left RJ- 45 connector is used for daisy output. Figure 3.2 Standard IQ Bus Wiring “Loops” from the Output to the Input of each IQ Component (for Hub-Style IQ Bus wiring) OUT IN IQ Interface IQ Component MC-IQ IQ Component

Figure 3.3 RJ-45 Output to Barrier Block Input Figure 3.5 RJ-45 Input to Barrier Block Output Figure 3.4 RJ-45 Output to Din Input

Adjust attenuator levels both on the amplifier and on the IQ-MC module Figure 3.6 RJ-45 Input to Din Output Figure 3.7 RJ-45 Output to RJ-45 Intput control panels within your IQ soft- ware for optimum system gain.

4200 and CTs 8200 amplifiers can be monitored and controlled from a remote location through the use of an IQ System. This module features SmartAmp™ capabilities which will enable the amplifier to function au- tomatically. For example, the IQ-MC module can automatically limit the audio signal, also detect and report various problems. In addition, the IQ-MC Load Su- pervision feature has the ability to verify the status of the loads in real time. The IQ-MC module uses Crown’s IQ2 protocol. This makes it possible for a user to design custom graphic display modules to control and moni- tor the unit with IQ2-compatible IQ software. This allows even greater flexibility within Crown’s IQ software via custom control pages. Plus, the IQ2 protocol provides for third-party programming for system controllers such as those from AMX and Crestron. The following sections describe the IQ-MC features and operation. Where specified, some features are accessed via controls located on the unit itself. However, many of the features can be controlled or con- figured using IQ for Windows soft- ware. Commands are transmitted via an IQ interface to the specified IQ component (an IQ2-compatible interface is required). Please con- tact your Crown representative or Crown’s Technical Support Group if you are unfamiliar with IQ software. 4.1 Hardware 4.1.1 Data Signal Presence Indicator An amber Data Signal Presence Indi- cator (DATA) is provided on the IQ- MC connector panel as well as the front of the amplifier. It flashes when- ever commands addressed to the IQ- MC module are received. To assist with troubleshooting, an option that forces the DATA indicator to remain lit is available through IQ software. 4.1.2 Preset Indicator A green PRESET indicator is provided on the IQ-MC connector panel. This indicator signals the number of the currently selected preset by emitting a series of flashes which match the preset number, followed by a pause. The indicator will continuously repeat the number selected until a change is made to any setting. 4.1.3 IQ Bus Input Connector An RJ-45 connector provides the input connection to the IQ Bus. Drop- out relays maintain loop integrity in the event power is removed from the IQ-MC module. 4.1.4 IQ Bus Daisy Output Connector An RJ-45 connector is provided for normal daisy wiring output to the next device on the loop in the IQ Bus. 4.1.5 AUX Input/Output and Listen Bus Connector An RJ-11 connector provides three functions. The AUX output delivers 15 VDC at 70 mA maximum output when switched on and may be con-

grammed to switch when a fail con- dition is present on any channel.* The high-impedance (10 K ohm) AUX input can sense logic signals and can be programmed to activate system mute or report fault condi- tions when a logic high is present. (See Section 5.2.2 for more informa- tion.) All amplifier channel’s output can be monitored as a balanced line level signal which is sent to pins 1 and 6 of the RJ-11 connector (soft- ware selectable). 4.1.6 IQ Bus “Drop Out” Relays “Drop out” relays are provided on the IQ Bus ports to maintain the continuity of the IQ communication loop even if the IQ-MC module loses power. 4.2 Hardware Controls The following IQ-MC controls are ac- cessed via hardware switches located on the unit. 4.2.1 IQ Address Switch (S1) An 8-section DIP switch is used to set the IQ address of the unit. A valid IQ address is any number from 1 to 250. Numbers higher than 250 are reserved for special use. An address of “0” places the unit in stand-alone mode. In this mode, the IQ bus port is disabled and the IQ- MC module will not function with IQ software. This switch is located on the rear of the amplifier. Each IQ component on a IQ Bus is given a unique IQ address so it can be independently controlled and monitored. Two or more IQ com- ponents of the same type should NEVER have the same address on the same IQ Bus loop. 4.2.2 Reset/Preset Switch A recessed reset/preset switch, ac- cessible from outside the IQ-MC panel, performs two functions. First, it enables the IQ-MC module to be re- stored to factory default settings, and second, allows the user to recall any of 10 presets. A straightened paper clip or similar small object is required to press the reset switch. -To select one of the 10 presets, complete the following steps: Remove all input signals. With the power on, briefly press the switch for less than two seconds to toggle through the 10 user-defined presets stored in firmware. Each press will increment the selected preset by one. After the switch is released, the DATA light will flash for a moment, then the PRESET indicator will blink to indicate the preset number selected. Restore input signals. -To restore the unit to the factory default settings, complete the fol- lowing steps: Remove all input signals. With the power on, press the switch and hold for more than 2 seconds, or until the DATA indicator blinks twice, and all settings will be reset to factory de- fault. When the switch is released, the DATA indicator will flash rapidly for a moment. Restore input signals. * The AUX output uses inverse logic when it is configured to report a fail condition. Normally high, it switches low when any channel fails a test. In this way it can also indicate a power loss.

factory default presets: Remove all input signals. Press in and hold the switch while applying power to the unit. The settings will be reset to factory default, with the firmware re- writing to EEPROM memory. Impor- tant: This action will re-write the memory and erase stored presets. With the button held in and power applied, the DATA and PRESET indi- cators will both be lit. When the button is released, the DATA and PRESET indicators will alternately blink for a few moments, indicating that memory is being written, then the DATA indi- cator will flash for a moment. After the unit has been reset to the factory default settings. 4.3 Amplifier Control and Monitoring The following IQ-MC module fea- tures are accessed via IQ for Win- dows software. 4.3.1 User Presets The parameters for all functions can be saved as presets. A total of 10 user presets can be stored in the IQ-MC EEPROM memory. Preset names are stored on the module. 4.3.2 Clip Monitor The Clip indicator of each channel of the amplifier can be monitored by the IQ System. The IQ-MC module can cause a warning to flash on your com- puter screen via IQ for Windows soft- ware indicating a Clip event, Also, it can report Clip events to it’s AUX port. 4.3.3 Input Signal Level Monitor The input signal level of each channel can be monitored. This monitor fea- ture has a range from +20 dBu to –40 dBu in ½-dB steps. 4.3.4 Output Signal Level Monitor The output signal level of each chan- nel of the amplifier can be monitored. This monitor feature has a range from 0 dB to –40 dB where 0 dB is refer- enced to the rated output voltage of the amplifier model.* The IQ-MC module features scaled output level meters. By factory de- fault, the meters are calibrated such that 0 dB equals the amplifier’s rated output into 8 ohms. In 70V/100V mode, the meters default to 0 dB equals 70/ 100 Vrms. Auto-scaling is handled by the software. 4.3.5 Thermal Headroom Level Monitor The Thermal Headroom level** of each channel of the amplifier can be moni- tored by the IQ software. This level represents the percent of available power/thermal capacity that is cur- rently being used within the output section of the amplifier. When the thermal headroom level reaches 100%, the amplifier cannot produce any more power and it will begin to limit the drive level to the output devices to protect them from too much stress***. The Thermal Lim- iter feature of the IQ-MC module can be set to engage upon a pre-selected thermal level. (See Section 4.3.14) * This is assumed to be 70V or the rated 8-ohm output. ** Thermal Headroom on your Crown am- plifier may be labeled Junction Tempera- ture Simulation (JTS). *** See the amplifier’s Reference or Owner’s Manual for more information about JTS and how it works.

Each channel’s output relay can be independently turned on and off. 4.3.7 Signal Mute The output signal of each channel can be independently muted. This function typically provides 80 dB or more of attenuation. 4.3.8 Polarity Inverter The polarity of the input signal of each channel can be independently inverted. 4.3.9 Input Signal Attenuator An attenuator at the input of each channel is used to control the input signal level. Each attenuator has a range from 0 dB to –80 dB in ½ dB steps. (Zero equals no attenuation.) 4.3.10 “Ghost Faders” These indicators let you monitor the signal path gain where it may differ from manual gain set on input at- tenuation and output trim as the re- sult of limiting or compression. They appear as flying faders “behind” the input attenuators. 4.3.11 Amp Information Several useful items of information about the host amplifier are deter- mined by the IQ-MC at start-up. These include manufacturer, model, date code, serial number, and revi- sion level. These can be printed from the system inventory (no on- screen display is available). 4.3.12 Amp Mode The IQ-MC module screen can show: • The position of the Dual/Bridge mode switches • The position of the back-panel attenuators However, the Dual/Bridge mode of the amplifier cannot be controlled via software. 4.3.13 Error Reporting The IQ-MC module can report six types of errors: Clip, Thermal, Fault, Load, Dual/Bridge-mode switch set- ting has been changed, Volume at- tenuator setting has been changed. You can route error reports for each condition above to: • Windows IQ software (system software). • AUX OUT. • Both software and AUX OUT. If you choose system software noti- fication, the IQ System will notify you of the error. If you choose AUX OUT notification, the AUX OUT signal will switch from OFF to ON when a se- lected error has occurred. If you prefer, error reporting can be switched off. Following is a descrip- tion of each error condition: Clip: You can choose to be informed when an excessive number of Clip events occur over a unit of time in either channel of the amplifier. When Clip error reporting is on, an alert will be generated when the number of Clip events per unit of time specified exceeds a count that you set. The Count control lets you set a number of Clip events per unit of time al- lowed before an error is generated. The range is 1 to 100. The Time control lets you set the unit of time in seconds during which the number of Clip error events are counted for possible error reporting. The range is 1 to 10 seconds.

warned if the thermal level rises above a predetermined level. The Threshold control lets you set the thermal level above which an error message will be reported. The range is from 1 to 100%. Fault: You can choose to be warned when an amplifier “fault” condition occurs when a channel fails. Load: You can choose to be warned if the impedance of the load being driven by the amplifier falls out of a pre-selected range. See Section 4.5 for instructions on setting up the load supervision feature. Dual/Bridge Switch Changed: You can choose to be warned if the Dual/ Bridge Switch setting has been changed. This condition risks ampli- fier damage or distortion. If you see this error, manually set the Dual/Bridge Switch to the correct position. Attenuator Setting Changed: You can choose to be informed that the back-panel attenuator setting has been changed since you set it up. 4.4 Signal Processing 4.4.1 Input Signal Compressor/Limiter An input signal compressor/limiter is available for each channel. There are five parameters which control this feature: On/Off: Turns this function on or off. Threshold: Sets the threshold, in dB, above which the compressor acts. The level is measured at the input to the module and corresponds to the level shown on an input meter. The compressor is “feed-forward,” meaning that the level detection point is located before the gain con- trol stage. The range is from +16 dBu to –40 dBu. Attack Time: Sets the attack time of the compressor. The attack time is defined as the time it takes the com- pressor to attenuate the input signal by 10 dB. The range is from 1 milli- second to 2 seconds. Release Time: Sets the release time of the compressor. The release time is defined as the time it takes the compressor to increase the input gain by 10 dB. The range is 100 milliseconds to 30 seconds. Compressor Ratio: Sets the com- pression ratio for the compressor. The range is 1, 2, 4, 8, 16, 32, ∞ to 1.* 4.4.2 Peak Voltage Limiter This limits the peak voltage output of the amplifier. There are four param- eters which control this limiter. On/Off: Turns the limiter on or off. Attack: Attack time is adjustable from 10 milliseconds to 100 millisec- onds per 10 dB of overdrive. Release: Release rate is adjustable from 100 milliseconds to 10 sec- onds per 10 dB or release. Threshold: Absolute voltage thresh- old is adjustable from 12 Vpk to 255 Vpk in 1 volt steps. 4.4.3 Average Power Limiter Limits the long-term power output from the amp. The actual output limiter threshold is determined by an absolute power threshold and the nominal load impedance set- ting. There are five parameters which control this limiter. * 1:1 is the same as “off.”

Average Power Threshold: The threshold is adjustable from 10 to 1000 watts.** Nominal Load Impedance: The nominal load impedance is settable from 1 to 1000 ohms, and should be set to correspond to the nominal impedance rating of the load con- nected to the respective channel. Attack Time: Adjustable from 1 sec- ond to 30 seconds in 1 second in- crements. Release Time: Adjustable from 1 second to 30 seconds in 1 second increments. 4.5 Load Supervision The Load Supervision feature al- lows real time monitoring of the load connected to each amplifier chan- nel. When enabled, the IQ-MC con- tinuously monitors the amplifier out- put voltage and current and calcu- lates the long-term average load impedance. The measured load im- pedance is compared against user defined high and low limits. If either limit is exceeded, the status indica- tor and/or IQ System error reporting functions alert the user of the prob- lem. There are six controls and two indicators for each channel: On/Off: Turns the Load Supervision feature on or off. High Limit: Sets the upper bound above which the system will report a “high” error status. Low Limit: Sets the lower bound below which the system will report a “low” error status. Nominal Load Impedance: Sets the expected average impedance for the connected load. This value deter- mines the output signal level required for test. This parameter is also used by the average power limiter to deter- mine the expected power limit thresh- old. See Section 4.4.3. Calculate: This button invokes an impedance calculator. Entering out- put voltage and power will give the expected impedance. Include in Standard Error Report- ing: Enables error reporting so that any high/low status condition is re- ported via the IQ System (See Sec- tion 4.3.13). Report to AUX: Enables any high/ low status condition to be reported via the IQ-MC AUX port output (See Section 4.1.5). Test Indicator: This indicator lights when the load supervision algorithm is actually performing a load imped- ance calculation and test verification. Low/Normal/High Indicator: This indicator shows the present status of the load with respect to the user defined high/low limits. Z avg Monitor: Reports actual cal- culated average load impedance. ** The average power threshold should be set per the loudspeaker’s “long-term” power rating (consult your speaker documentation).

This section provides additional in- formation about Crown’s IQ System with special guides to aid in the installation and use of the IQ-MC module. For more information about any of these topics, contact Crown Technical Support. 5.1 A Closer Look at IQ Bus Wiring The IQ-MC module must be con- nected to a IQ Bus loop having an IQ2-compatible IQ interface in or- der for the IQ System to control or monitor it. The IQ Bus is a serial communication loop designed to transmit IQ commands and data. As implemented in the IQ-MC, it is a 20 milliamp current loop operating at a BAUD rate of 38.4 K. The loop must be unbroken to function properly. If the system includes an IQ–INT 3 interface, it can accept eight different IQ Bus loops or zones. Dividing the sound system into different zones, each with its own IQ Bus loop, can have several advantages. The fol- lowing list contrasts those advan- tages with those of a single loop. Multiloop Advantages • A break in communication in one loop does not affect other loops. • Over 250 IQ components of the same type can be used in a sys- tem. • The same IQ address can be used more than once (once per loop per model). Single Loop Advantages (with IQ-INT 3 interfaces) • The IQ System can send and retrieve data faster in a single loop. • “Real time” level display of a greater number of units is pos- sible. CH 8 Figure 4.1 MC-IQ Signal Flow Block Diagram

nected to the IQ Bus with inexpen- sive twisted-pair wiring (shielded or unshielded). If fiber optic wiring is required contact Crown Technical Support (see page 28). Here are some guidelines for twisted- pair wiring: • Use shielded twisted-pair wire at least 26 AWG in size when interference is a problem. The wire should be of good quality and should have low capaci- tance—30 picofarads/foot or less is good. The shield serves two purposes: First, it helps pre- vent the IQ data signal from transmitting to nearby audio wir- ing. Second, it helps prevent out- side RF from interfering with the data signal. However, in most cases interference is not a prob- lem and, since unshielded wire has lower capacitance, it is a better choice. • Minimize the total capacitance of each IQ Bus loop. The total capacitance should be less than 30 nanofarads. Allow for ap- proximately 60 picofarads for each IQ component in a loop. This accounts for a slight delay which occurs as data signals pass through a component. • Add an IQ Repeater (RPT3) for very long loops—greater than 1,000 feet (305 m)—or when re- quired by high-capacitance wire. Although we recommend a repeater for loops longer than 1,000 feet, it is often possible to go 2,000 feet (610 m) or more. The most significant characteris- tic of the wire is its capacitance. Lower capacitance allows longer loops. Unshielded wire usually has less capacitance. • Never use the ground wire in a mic snake line. It may some- times be convenient to run IQ Bus data signals to and from stage monitor amplifiers along unused wire pairs in a mic snake. Do not use the ground wire which is normally connected to pin 1 on an XLR connector or data noise will be added to the audio lines. Use only the signal lines which normally connect to pins 2 and 3 of the XLRs.* Outside RF interference is seldom a problem for a IQ Bus loop—espe- cially if shielded twisted-pair wire is used. However, there are extreme situations when fiber optic wiring is recommended. For example, locat- ing a IQ Bus loop next to an AM radio transmission line may require fiber optic cabling. An extremely long IQ Bus loop distance may also require fiber optic cabling. 5.2 Using the AUX Connector The IQ System offers tremendous flexibility and the auxiliary feature connector provides a means of tap- ping into it. It can be used to turn peripherals on/off, send a signal to another system component, receive a signal from another component, and send a line level audio signal of amplifier’s output. The AUX connector is an RJ-11 type. Pins 2 and 5 are used to receive a signal and pins 3 and 4 are used to send a signal. * Because typical mic cables have high ca- pacitance, the maximum possible Crown Bus loop distance will be less.

When the auxiliary feature is turned on by the IQ for Windows software +15 VDC is supplied across pins 3 (ground) and 4 (+). A total of 70 milliamps of current is available. The smart switch mosfet protects against shorts (see Figure 5.1). There are many possible uses for the AUX output. For example, it can be used to turn on auxiliary cooling fans. To do this the AUX connector might be used to close a relay. The relay would then turn the fans on or off. This is shown in Figure 5.2. +15 VDC internal control logic SMART MOSFET Figure 5.1 The Internal AUX Circuit Figure 5.2 A Sample AUX Output Circuit

tion of amplifiers with the IQ System software, the need for additional cooling would be apparent. The same software could then be used to turn on the appropriate AUX con- nector. (For more information about turning the auxiliary feature on/off, consult the IQ for Windows software documentation.) 5.2.2 AUX Input Depending on the IQ software be- ing used, the AUX connector can be used to sense the presence of an input signal across pins 2 (+) and 5 (ground). A +5 to +15 VDC signal at the input will be interpreted as a logic “high” and will be communi- cated to the IQ Bus where a host computer or controller can act upon it. A signal less than +1.6 VDC is interpreted as a logic “low.”* 5.3 Listen Bus Use the diagram in Figure 5.3 to con- nect an audio monitoring system, such as a headphone preamp, to the IQ- MC Listen Bus. Figure 5.4 demonstrates how mul- tiple amplifiers can be monitored using the Listen Bus. Crown’s IQ for Windows software allows you to se- lect the amplifier and channel you wish to monitor. 5.4 Working with RJ-11 and RJ-45 Connectors Pin assignments for standard RJ-11 and RJ-45 connectors are indicated in Figure 5.5. * A negative signal can also be used as a logic low because the signal is internally clamped to protect the internal circuitry. Figure 5.3 Listen Bus Connection Amp 1 Amp 2 Figure 5.4 Multiple-Amp Listen Bus Configuration Figure 5.5 RJ-11 & RJ-45 Pin Assignments

good practice to follow the USOC protocol for RJ-11 connector cable. This protocol assigns wire colors as follows: 1 white-green 4 white-blue 2 white-orange 5 orange-white 3 blue-white 6 green-white When wiring RJ-45 connectors, it is good practice to follow the EIA/TIA 568B protocol for RJ-45 connector cable. This protocol assigns wire colors as follows: 1 white-orange 5 white-blue 2 orange-white 6 green-white 3 white-green 7 white-brown 4 blue-white 8 brown-white Extra care must be taken when at- taching RJ-11 and RJ-45 connectors to cable. Make sure you use the ap- propriate crimping tool and verify that the connector is properly seated into the tool, or damage will result. Contact Crown Technical Support for additional information about working with RJ-11 and RJ-45 connectors. 5.5 Load Supervision Applications The IQ-MC Load Supervision feature can be used to monitor the amplifier load in real time with almost any pro- gram material. Average load imped- ance is calculated as a function of amplifier output voltage and current. The system requires approximately 20-30 mA of average amplifier output current for adequate supervision. This allows typically low average output power levels of less than ½ watt with most loads. The maximum load im- pedance for reliable system perfor- mance is limited to about 50 ohms. Higher impedances can be measured but may require higher amplifier out- put levels for reliable operation. Most amplifier/load systems can be configured and supervised by fol- lowing these steps: 1 Configure your audio system us- ing a known “good” load, then enable the Load Supervision fea- ture. 2 Provide typical program material at a level high enough to light the “test” indicator. 3 Run the system at this level until the average impedance stabilizes. This may take seconds to minutes de- pending on level, duty-cycle, etc. 4 Set the nominal impedance at the measured value average. This optimizes the supervision algo- rithm for voltage and current levels versus the actual load. Note: A higher nominal setting will require higher output levels. 5 Set the high limit at twice average and the low limit at one-fourth nominal.* 6 Let the system run for extended periods using any and all typical program material. 7 Adjust the high/low limits, if neces- sary, to account for any variance in average measured impedance. 8 Enable error reporting, if desired. * These limits are somewhat arbitrary but should be a good starting point.

most applications. However, some applications can be a little more difficult. Some very low-level and/or low duty-cycle signals may not ad- equately “test” the load. Lab and situation testing have shown output levels as small 40 dB below rated amplifier output to be enough for most low-impedance loads. Higher impedance loads such as those used in “lightly-loaded” 70V distri- bution lines may require signal level near 20 dB below rated output. The “Nominal Load Impedance” control is used to optimize the sys- tem for the most accurate calcula- tion of load impedance. It should be set to the expected nominal (or rated) impedance of the “normal” load. The high limit should be set for at least 2 times the expected nominal or ac- tual measured load, while the low limit should be set to ½ the expected nominal or actual measured load. The following example calculates the SPL necessary for supervision of a typical 8-ohm system. While the resulting 80-dB SPL @ 1 meter is definitely above conversation level, it is not uncomfortable. An “8 ohm” example: 30 mA into 8 ohms = 0.007watts 8-ohm driver sensitivity = 100dB for 1W @ 1 meter 0.007W/1W = –20dB Required SPL for supervision test is 100dB – 20dB = 80dB SPL @ 1 meter 5.5.1 Typical Load Character- istics to Know and Understand It is well known that the typical loud- speaker impedance is not the same for all frequencies. This variance is due to the effect of electrical proper- ties such as the expected increase in impedance at high frequencies due to driver voice-coil inductance, or the peaks and valleys due to passive crossovers. Testing of vari- ous passive boxes has shown peaks of 100 ohms or more! Low frequency impedance variation can come from the interaction of the driver compli- ance with that of the box. The low frequency variations are usually wide bandwidth and may vary from 6 to 30 ohms on an 8-ohm driver. These anomalies are easily aver- aged out by the IQ-MC supervision algorithm in most systems. How- ever, there may be some extreme situations for very narrow bandwidth (i.e. single-note) signals and/or very widely varying loads that the algo- rithm simply cannot overcome. In these cases, widening the high and low limits will help decrease the “sen- sitivity” of supervision and decrease chance of “nuisance” error reports.

switch sets the IQ address (decimal range: 1–250)*. A Reset/Preset switch, accessible with a straightened paper clip through the module’s front panel, selects the next user preset if pressed for less than 2 seconds, resets set- tings to “factory default ” if it is pressed for more than 2 seconds, or re-writes from firmware to flash memory restoring all settings to fac- tory default if it is pressed while apply- ing power. Jumpers select thru or processed signal for daisy output of each channel. Connectors: IQ Bus: RJ-45 con- nector for input, RJ-45 connector for daisy output. AUX In/Aux Out/Listen Bus: RJ-11 connector. Indicators: A yellow DATA indicator flashes when a valid IQ command is received from the IQ System via the IQ Bus. The DATA indicator can be forced on to facilitate rapid trouble- shooting of IQ Bus wiring. A green PRESET indicator flashes to indi- cate the user preset number cur- rently selected in memory. If the PRESET indicator does not flash the preset number when selected, this indicates the preset has been modi- fied by the user. Memory Backup: 8 Kbyte EEPROM for backup of run-time parameters, presets, and program storage. Ca- pable of 80,000 writes minimum. * If address “0” is selected, the MC-IQ will operate in stand-alone mode. In this mode, the Crown bus port is deactivated. IQ Bus Data Communication Protection: If communication is lost, the unit will continue to function with the last commands received. Data Rate: 38.4 K BAUD. Data Format: Serial, binary, asyn- chronous; 1 start bit; 1 stop bit; 8 data bits; no parity. IQ Bus Interface Type: Optically isolated 20 milliamp serial loop. Operation: Half duplex. Transmission Distance: Variable from 200 to 3000 feet (61 to 914 m), depending upon wire capacitance. Typically 1000 feet (305 M) using shielded twisted-pair wire, #26 AWG or larger. Can be extended with an IQ Repeater. Audio Please note: The audio specifications are referenced to 0.775 V (0 dBu). Mea- surements were made at the output of the IQ-MC module, itself. Maximum Input Level: +20 dBu. Dynamic Range: >100 dB (A- weighted, 20 Hz to 20 kHz). Frequency Response: ±0.5 dB from 20 Hz to 20 kHz. Common Mode Rejection (CMR): 50 dB (typical). Total Harmonic Distortion + Noise (THD+N): <0.05% (1 kHz, 0dBu). Maximum Output Level: +20 dBu. IQ System Data Acquisition Multi-Channel, 14-bit Analog to Digital Converter. Input/Output Monitor Accuracy: Typically ±1 dB.

The following pages in this section contain lookup tables for every valid IQ address. The valid addresses are 1 to 250. Remember that address “0” (zero) will put the IQ-MC into a stand- alone mode where it is invisible to the IQ System and acts like a “dumb” balanced audio input. Do not use an address number higher than 250! Addresses above 250 are reserved for special system use. Remember: No two IQ components of the same type which are connected to the same IQ Bus loop can have the same address. To use the IQ address tables, simply find the address you want and set the IQ address switch of the IQ-MC mod- ule as shown.

service information page found in the back of this manual and send it along with your proof of purchase and the defective unit to the Crown factory. For warranty service, we will pay for ground shipping both ways in the United States. Contact Crown Fac- tory Service or Technical Support to obtain prepaid shipping labels prior to sending the unit. Or, if you prefer, you may prepay the cost of shipping, and Crown will reimburse you. Send copies of the shipping receipts to Crown to receive reimbursement. Your repaired unit will be returned via UPS ground. Please contact us if other arrangements are required. Factory Service Shipping Instructions: 1. When sending a Crown product to the factory for service, be sure to fill out the service information form that follows and enclose it inside your unit’s shipping pack. Do not send the service information form separately. 2. To ensure the safe transportation of your unit to the factory, ship it in an original factory packing con- tainer. If you don’t have one, call or write Crown’s Parts Department. With the exception of polyure- thane or wooden crates, any other packing material will not be suffi- cient to withstand the stress of shipping. Do not use loose, small size packing materials. 3. Do not ship the unit in any kind of cabinet (wood or metal). Ignoring this warning may result in exten- sive damage to the unit and the cabinet. Accessories are not needed—do not send the product documentation, cables and other hardware. If you have any questions, please call or write the Crown Technical Support Group. Crown Factory Service 1718 W. Mishawaka Rd. Elkhart, Indiana 46517 U.S.A. Telephone: 574-294-8200 800-342-6939 (North America, Puerto Rico, and Virgin Islands only) Facsimile: 574-294-8301 (Technical Support) 574-294-8124 (Factory Service) Internet: http://www.crownaudio.com Always use the original factory pack to transport the unit.

SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT OWNER of each NEW Crown product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship. We further warrant the new Crown product regardless of the reason for failure, except as excluded in this Warranty. ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts. This Crown Warranty also does not extend to the new Crown product if the serial number has been defaced, altered, or removed. WHAT THE WARRANTOR WILL DO We will remedy any defect, regardless of the reason for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to provide replacement, and repair is not practical or cannot be timely made. If a refund is elected, then you must make the defective or malfunctioning product available to us free and clear of all liens or other encumbrances. The refund will be equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on the product from the date of original purchase. Warranty work can only be performed at our authorized service centers or at the factory. Warranty work for some products can only be performed at our factory. We will remedy the defect and ship the product from the service center or our factory within a reasonable time after receipt of the defective product at our authorized service center or our factory. All expenses in remedying the defect, including surface shipping costs in the United States, will be borne by us. (You must bear the expense of shipping the product between any foreign country and the port of entry in the United States and all taxes, duties, and other customs fees for such foreign shipments.) HOW TO OBTAIN WARRANTY SERVICE You must notify us of your need for warranty service within the warranty period. All components must be shipped in a factory pack, which, if needed, may be obtained from us free of charge. Corrective action will be taken within a reasonable time of the date of receipt of the defective product by us or our authorized service center. If the repairs made by us or our authorized service center are not satisfactory, notify us or our authorized service center immediately. DISCLAIMER OF CONSEQUENTIAL & INCIDENTAL DAMAGES YOU ARE NOT ENTITLED TO RECOVER FROM US ANY INCIDENTAL DAMAGES RESULTING FROM ANY DEFECT IN THE NEW CROWN PRODUCT. THIS INCLUDES ANY DAMAGE TO ANOTHER PRODUCT OR PRODUCTS RESULTING FROM SUCH A DEFECT. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATIONS OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU. WARRANTY ALTERATIONS No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product. Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown Warranty. DESIGN CHANGES We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured. LEGAL REMEDIES OF PURCHASER THIS CROWN WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE. No action to enforce this Crown Warranty shall be commenced later than ninety (90) days after expiration of the warranty period. THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS CONTAINED IN THIS MANUAL FOR CROWN PRODUCTS. 7/01 THREE YEAR FULL WARRANTY YEAR3

SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT OWNER of each NEW Crown1 product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship, and we further warrant the new Crown product regardless of the reason for failure, except as excluded in this Crown Warranty. 1 Note: If your unit bears the name “Amcron,” please substitute it for the name “Crown” in this warranty. ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts. This Crown Warranty also does not extend to the new Crown product if the serial number has been defaced, altered, or removed. WHAT THE WARRANTOR WILL DO We will remedy any defect, regardless of the reason for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to provide replacement, and repair is not practical or cannot be timely made. If a refund is elected, then you must make the defective or malfunctioning product available to us free and clear of all liens or other encumbrances. The refund will be equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on the product from the date of original purchase. Warranty work can only be performed at our authorized service centers. We will remedy the defect and ship the product from the service center within a reasonable time after receipt of the defective product at our authorized service center. HOW TO OBTAIN WARRANTY SERVlCE You must notify us of your need for warranty service within the warranty period. All components must be shipped in a factory pack. Corrective action will be taken within a reasonable time of the date of receipt of the defective product by our authorized service center. If the repairs made by our authorized service center are not satisfactory, notify our authorized service center immediately. DISCLAIMER OF CONSEQUENTIAL & INCIDENTAL DAMAGES YOU ARE NOT ENTITLED TO RECOVER FROM US ANY INCIDENTAL DAMAGES RESULTING FROM ANY DEFECT IN THE NEW CROWN PRODUCT. THIS INCLUDES ANY DAMAGE TO ANOTHER PRODUCT OR PRODUCTS RESULTING FROM SUCH A DEFECT. WARRANTY ALTERATIONS No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product. Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown Warranty. DESIGN CHANGES We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured. LEGAL REMEDIES OF PURCHASER No action to enforce this Crown Warranty shall be commenced later than ninety (90) days after expiration of the warranty period. THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS CONTAINED IN THIS MANUAL FOR CROWN PRODUCTS.

Shipping Address: Crown Customer Service, 1718 W. Mishawaka Rd., Elkhart, IN U.S.A. 46517 Phone: 1-800-342-6939 or 1-574-294-8200 Fax: 1-574-294-8124 Owner’s Name: Shipping Address: Phone Number: Fax Number: E-mail: Model: Serial Number: Purchase Date: NATURE OF PROBLEM (Be sure to describe the conditions that existed when the problem occurred and what attempts were made to correct it.) ______________________________________________________________________________ __________________________________________________________________________________ ______________________________________________________________________________ __________________________________________________________________________________ ______________________________________________________________________________ __________________________________________________________________________________ Other equipment in your system: ___________________________________________ ______________________________________________________________________________ __________________________________________________________________________________ ______________________________________________________________________________ ________________________________________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________________________________________ __________________________________________________________________________________ If warranty has expired, payment will be: ❏❏❏❏❏ Cash/Check ❏❏❏❏❏ VISA ❏❏❏❏❏ MasterCard ❏❏❏❏❏ C.O.D. ❏ ❏ ❏ ❏ ❏ P.O. for Crown Dealer Card Number: ________________________________________________ Exp. Date:____________ Signature:______________________________ ENCLOSE THIS PORTION WITH THE UNIT. DO NOT MAIL SEPARATELY.