Velleman VDL215EQ Manuals

VDL215EQ 1 VELLEMAN VDL215EQ – DUAL 15-BAND GRAPHIC EQUALIZER 1. Introduction Thank you for buying the VDL215EQ! Please read the manual thoroughly before bringing this device into service. If the device was damaged in transit, don't install or use it and contact your dealer. 2. Safety Instructions Be very careful during the installation: touching live wires can cause life-threatening electroshocks. Keep this device away from rain and moisture. • Damage caused by disregard of the guidelines in this manual or by user modifications is not covered by the warranty and the dealer will not accept responsibility for any ensuing defects or problems. • A qualified technician should install and service this device. • Do not switch the device on immediately after it has been exposed to changes in temperature. Protect the device against damage by leaving it switched off until it has reached room temperature. • Make sure that the available voltage does not exceed the voltage stated in the specifications of this manual. • Do not crimp the power cord and protect it against damage. Have an authorised dealer replace it if necessary. • Disconnect the device from the mains to clean it or when it is not in use. Handle the power cord by the plug only. • Keep the device away from children and unauthorised users. 3. General Guidelines • This device is designed for professional use in discos, theatres, etc. The VDL215EQ should only be used indoors, connected to an alternating current of max. 230V AC/50Hz. • Do not shake the device. Avoid brute force when installing or operating the device. • Install the device where it is protected against extreme heat (see “7. Technical Specifications”), dust and moisture. • Familiarise yourself with the functions of the device before actually using it. Do not allow operation by unqualified people. Any damage that may occur will most probably be due to unprofessional use of the device. • Use the original packaging if the device is to be transported. • All modifications of the device are forbidden for safety reasons. • Only use the device for its intended purpose. Using the device in an unauthorised way will void the warranty. 4. Installation • The VDL215EQ is designed to be mounted in a standard 19" equipment rack or in a portable case. • Install the device in a location where few people pass by and that is unreachable for unauthorised persons. 5. Commands and Connectors a. Front Panel - Commands 1. EQ level controls 2. EQ on/off button 3. EQ Range selection (6/12dB) 4. Low cut button (sets 30Hz to -6dB) 5. Channel level control 6. Peak indicator (red LED): lower the level (#5) if this LED remains lit continuously. 7. On/off switch Fig.1

VDL215EQ VELLEMAN 1 VDL215EQ GRAPHIC EQUALIZER - - DUAL 15 BAND 1. Description The VDL215EQ is a two-channel, 15-band, 2/3 octave graphic equalizer. The device offers 5% centre frequency accuracy and frequency control from 25Hz to 16KHz. Special features include the selectable range (6dB or 12dB), active balanced and unbalanced input/output connectors, adjustable level control, a passive bypass switch, an overload threshold LED and a ground-lifting switch. 2. Installation This equalizer is designed to be mounted in a standard 19" equipment rack or in a portable case. 3. Input / Output Connections This equalizer is equipped with two paralleled input and output connectors. The XLR and ¼" TRS connectors are actively balanced : pin 2 or the tip is (+), pin 3 or the ring is (-) and pin 1 or the sleeve is ground. For unbalanced operation, you will need to use pin 2 of the XLR or the tip of the ¼" TRS as Hi (+) and pin 1 of the XLR or the sleeve of the ¼" TRS as ground. Balanced output requires using pin 2 of the XLR or the tip of the ¼" TRS as output Hi (+) and using pin 3 of the XLR or the ring of the ¼" TRS as Lo (-). It does not require the use of pin 1 as the signal's ground. The signal is balanced when it reaches the output. The ground connection is solely used for protection against interfering signals. The inputs and outputs can be paralleled by using any of the three connectors. Note : As a rule, the ¼" TRS is used. 4. Signal Levels Signal levels from –10dBu to +4dBu are considered normal and there is a minimum tolerance of 20dB above these levels. Do not establish any direct connections between the microphones and the equalizers. Microphones can only be used with a preamplifier. 5. Chassis Grounding The rear panel of this unique equalizer is equipped with a ground-lifting switch. Excessive humming or buzzing once the system has been installed indicates a ground incompatibility between your equalizer and the other equipment in the system. Several combinations can be attempted. Note : ALWAYS TURN OFF YOUR AMPLIFIERS BEFORE CHANGING YOUR GROUND. Try different combinations on units equipped with ground-lifting switches or make sure that all chassis are connected to earth ground through the mounting screws of the front panel rack. 6. Operating instructions The equalizer is equipped with a bypass switch with a LED indicator. When the bypass switch is ON, the green LED will also be ON and all equalizer settings will automatically be cancelled. The signal will flow through at unity gain. Also included is a range selection switch with LED indicators : the 6dB range has a green LED, the 12dB range a yellow one. There is also a level control potentiometer available that has a range of -∞ to +6dB. Note : In case of excessive gain, the red peak LED will light up when the signal comes to within 3dB of the clipping level. There is no problem if this occurs occasionally and the LED only flashes from time to time ; if the LED is lit continuously, however, the user should readjust the level control. Below are some tips for the initial setup.