Crest Audio CKX150 Specifications

specifically for the unique requirements of high quality, transformer-iso- lated 100V, 70.7V, or 50V operation (factory configured) distributed sound systems in commercial, industrial and institutional installations. Design goals met by the CKX150 include exceptional sonic accuracy, high efficiency, minimum power consumption, comprehensive loud- speaker protection, and the ability to handle extended duty cycles. In addition, the CKX150 incorporates Crest Audio’s proprietary modu- lar approach to input/output and external control configuration. We call this concept Power Processing. Through the provision of three plug-in module bays, these amplifiers offer exceptional flexibility with integral signal processing, load monitoring, and either local or system-wide com- puter control via Crest Audio’s NexSys® network. The CKX150 amplifier is manufactured exclusively in Crest Audio’s own USA plant, using only the highest quality components. Key sub- assemblies are individually pre-tested, and all units are rigorously “burned-in” before final checkout on precision test equipment. CKX150 POWER PROCESSING AMPLIFIER Power Specification 40Hz–20kHz, 0.1% THD+N 75W • Transformer-isolated outputs. 100V, 70.7V, or 50V operation (factory configured) • Sequential Turn-On/Off (STO). Standard system uses any +8 to +18VDC source and contact closure. • PowerSave. Reduces power consumption at idle by turning off the bias circuit (and fan if heat sink temperature is below allowed thresh- old) when no signal present at input. • 3 Module Bays. Unique chassis construction provides three separate bays into which a diverse range of space-saving and cost effective Input Processing, Network and Power/Output modules can be fitted. By combining multiple processing and control functions in the ampli- fier, CKX Series Power Processing amplifiers significantly save on installation costs versus conventional outboard processing. • Cool Operation. High thermal mass heat sinks, with high-efficiency variable speed fan. Front panel mounted filter for easy maintenance. • “Overbuilt” Power Supply. In the Crest tradition, the power supply is “over-engineered” for ample current reserves to meet demanding load conditions. • More Transistors. More output devices than comparably-powered competitive models to provide wider safe operating area and lower heat generation. • TourClass® Protection Circuits: ACL (Active Clip Limiting) prevents speaker damage with gentle gain reduction at clip threshold. IGM (Instantaneous Gain Modulation) monitors connected loads to detect conditions that may overstress output devices, allowing safe operation into difficult loads. AutoRamp gradually increases gain to attenuator setting level when amplifier is turned on. TourClass also includes comprehensive thermal management, and short circuit, DC voltage, turn-on/off transient, current inrush and sub/ultrasonic input protection. • Selectable input sensitivity/voltage gain (internal jumpers) • Front panel status indication • Rear panel attenuators with removable knobs • Barrier strip input and output connectors • Optional input isolation transformers • Front panel label area CKX150 Features Figures are watts per channel, both channels driven. NexSys is a registered trademark of Crest Audio Inc. Preliminary Product Description

PRELIMINARY SPECIFICATIONS Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL: 201.909.8700 FAX: 201.909.8744 http://www.crestaudio.com Printed in USA Com Out In +8 to 18VDC 20 mA Model CC-STL NEC CLASS 2 ONLY Sequential Turn-On Output A B + + – – Signal Ground Lift Jumper CLASS 2 WIRING MAY BE USED 7 8 9 5 2 0 1 3 4 6 10 7 8 9 5 2 0 1 3 4 6 10 Model CC-IPB Level B Level A Input A Input B + + – – Model CC-BLK Designed & manufactured in the USA by: Crest Audio Inc. 100 Eisenhower Dr. Paramus, New Jersey 07652 USA Model Name CKS 100 CKS 200 CKS 400 CKS 800 CKS 800-2 CKS 1200-2 CKS 1600-2 Output Power @8Ω/Ch. 50W 100W 200W 400W 400W 600W 800W Model Name CKV 100 CKV 200 CKV 400 CKV 800 CKV 1600 CKV 2400 Output Power @70.7V/Ch. 50W 100W 200W 400W 800W 1200W Model Name Output Power @100V/Ch. CKX 150 CKX 300 CKX 500 CKX 800 75W 150W 250W 400W Output Power, 100 volt (50 or 70.7 volt option) Max RMS Output Voltage (each channel) Peak Output Voltage (each channel) Frequency Response (1W/100V) Power Bandwidth (rated power, 1% THD+N) TourClass® Protection THD+N (rated power, 1kHz) SMPTE IMD (rated power, 60Hz & 7kHz) Input CMRR (1kHz) Input Sensitivity (rated power) Voltage Gain Input Impedance (balanced, unbalanced) Hum and Noise (below rated power) Crosstalk (below rated power) Class Input Connectors (per channel) Output Connectors (per channel) Filter Storage Power Supply (factory configured) Idle Current Draw (240V) 1/8 Power Current Draw (typical music, 240V) 1/3 Power Current Draw (cont. music, 240V) Max Current Draw (breaker rating, 240V) Thermal Emissions (1/8 Power, 240V) Thermal Emissions (1/3 Power, 240V) Cooling Controls LED Indicators (per channel) Construction Dimensions (Height x Width x Depth) Gross Weight, Net Weight 40Hz–20kHz, 0.1% THD+N 75 watts 105V 150V 38Hz–38kHz, +0/-3dB 40Hz–16kHz, +0/-1dB ACL, IGM, AutoRamp, short circuit, DC voltage, turn- on/off transient, current inrush, sub/ultrasonic input. <0.1% <0.1% >60dB 0.61V at X40 gain setting X40 standard, X20 & 0.775V user-selectable >20kΩ, >10kΩ 105dB, A-weighted >60dB @ 1kHz AB Rear-panel barrier strip input, 4-pin Phoenix sequential turn-on/off connector on standard CC-STL module Touch-proof rear-panel barrier strip output 20,000µF 100–240V, 50–60Hz 0.25A (PowerSave active) 0.57A 0.77A 1.88A 363BTU/hr 427BTU/hr Variable speed, front panel mounted fan, front-to-side airflow 3-position front panel On/Remote/Off switch, two rear- panel channel attenuators, AC mains circuit breaker Active, Protect, Channel Signal, Channel ACL Steel chassis, 16 gauge. Double thickness in rack ear areas. 5.25" x 19" x 17.13" / 133 x 483 x 435mm 37lbs. (16.82kg), 32lbs. (14.55kg) Architect’s & Engineer’s Specifications The power amplifier shall consist of 2 channels and deliver a minimum of 75 watts per channel into a 100 volt (50 or 70.7 volt option) “constant voltage” line without the need for external step-up transformers, both channels driven, 40Hz–16kHz, 0.1% THD+N. A variable speed fan, with the ability to completely turn off under appropriate ambient temperature conditions, shall pro- vide air flow through the chassis from front to both sides. The amplifier shall have circuitry to protect itself and the speaker load from output short circuits, DC voltage on out- puts, and thermal overload. The amplifier shall include cir- cuitry to gradually increase gain to attenuator setting levels when amplifier is turned on, and circuitry for impedance sensing and active clip limiting. The amplifier shall include an energy saving feature which shall automatically remove the output stage bias current when the amplifier is in an idle condition. The amplifier shall have a voltage gain of X40, or a voltage gain of X20, or an input sensitivity of .775V, for rated power, internally jumper-selectable. The hum and noise level shall be greater than 105dB below rated output, A-weighted. The amplifier shall have a class AB output stage (with a modulat- ed power supply). The frequency response shall be greater than 40Hz–16kHz, (-1dB) at rated power. The amplifier shall operate at either 100, 120, 220, 230, or 240 volts, 50–60Hz AC (configured at factory). Maximum current draw at 240V shall be no greater than 1.88A, both channels driven continu- ously into a 100V line. Front panel LED indicators shall include Active, Protect, Signal Present, and ACL (Clip Limiting) LEDs for each chan- nel. The power switch shall have three positions; one to per- mit power up from a remote location, one to permit local power up, and an ‘off’ position. The fan filter shall be front panel mounted, with no tools required for removal. The rear panel shall be configured with three openings or bays which will accept plug-in modules used to accomplish input signal processing, network control, remote sequential turn-on/off and other related functions. The output module shall be fitted with the following connectors: 5mm, 4-pin Phoenix for sequential turn-on/off wiring, and a touch-proof output barrier strip with 0.438" (11mm) screw spacing, and 0.320" (8mm) lug space. The input module shall be fitted with an input barrier strip connector with 0.320" (8mm) screw spacing, and 0.270" (7mm) lug space, and two individual channel attenuators with removable knobs. A user re-settable AC mains circuit breaker and an IEC AC mains socket shall be provided on the rear panel. A single AC mains cord having an appropriate AC plug for the intended operating voltage shall be provided. The packaging of the amplifier shall allow for standard rack mounting without requiring space between similar units. Dimensions shall be 19" (435mm) wide, 5.25" (133mm) high and 17.13" (435mm) deep. It shall weigh 32lbs. (14.55kg) net. The amplifier shall be designated the Crest Audio model CKX150. v. 1.1 10/3/97 A3300034 Rear View Power figures are watts per chan- nel, both channels driven. Crest Audio reserves the right to make improvements in manufac- turing or design which may affect specification. Crest Audio specification literature is available in electronic form to qualified users. Contact Crest Audio Inc. for more information. ©1997 Crest Audio Inc. *A3300034*