User manual BIAMP EQ-140

[. . . ] Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. [. . . ] Connections to these teminals must be made by qualified personnel. 2 3 4 5 FRONT PANEL 1. Graphic Equalizer. The graphic equalizer section divides the audio spectrum into 9 bands. Each band is one octave wide and is centered on ISO standard frequencies. Each control provides up to 15 dB of boost or cut at its center frequency. Each mark above and below the center position indicates a change of 3 dB. NOTE: When using the EQ-140 autoformer (for 8, 70V, or 100V output) lower frequency filters (64Hz, 125Hz, & 250Hz) should not be boosted (see Output Barrier Strip on next page). The level control determines the amplitude of the output signal. This green LED indicates that AC power is on. 4. Signal Present Indicator. This green LED turns on when the output signal is greater than or equal to approximately -20 dBu (80 mv) at the 4 ohm output. This red LED turns on when the output signal is either beginning to clip or is on the verge of clipping. The level control should be adjusted so the Peak Indicator does not light during normal operation. The bottom three terminals on this barrier strip are unused. 5. 7 OPTIONS & ACCESSORIES CAUTION: Modifications must be performed by qualified service professionals. AC power must be disconnected, and the top panel must be removed before performing any of the following modifications to the EQ-140. FILTER IN OUT High-Pass Filter A jumper strap labelled `FILTER' on the amplifier circuit board enables or disables an 18dB/octave 180Hz high-pass filter. When the strap is in the "IN" (up) position, the filter is enabled. When the strap is in the "OUT" (down) position, the filter is disabled. To avoid high magnetization currents which cause the amplifier to current limit and distort the output signal when low frequencies are present, the high pass filter must be strapped "IN" when using the autoformer (8 ohm, 70V, 100V) outputs. This strap is set "IN" when the unit is shipped from the factory. Rack Mounting Rack mounting brackets are provided with the EQ-140. To install these brackets, the top cover of the unit must first be removed. The brackets are then attached to the top cover using the hardware supplied. The top cover is then reattached. 8 BLOCK DIAGRAM & SPECIFICATIONS EQ-140 Block Diagram Signal Present Signal Detect Peak 64 125 250 500 1k 2k 4k 8k 16k Input HPF + Gnd Balanced input Stage In HPF 180Hz 18dB/octave Driver Amplifier Power Amplifier Out 9-band graphic equalizer Level Output Common 4 Out Xfmr In 8 Out 70V Out 100V Out Distribution Autoformer _________________________________ SPECIFICATIONS _________________________________ AMPLIFIER SECTION: Output Power (2kHz @ 0. 2% THD) Frequency Response (20Hz-20kHz @ 60W) Total Harmonic Distortion (20Hz-20kHz @ 60W) Intermodulation Distortion (SMPTE) Signal-to-Noise Ratio (20Hz-20kHz @ 60W) Input Sensistivity Input Impedance balanced unbalanced INTERNAL AUTOFORMER: Frequency Response (150Hz-20kHz @ 60W/70V output) Total Harmonic Distortion (2kHz @ 60W/70V output) EQUALIZER SECTION: Filter Gain Center Frequencies >60 watts +0/-1. 5dB <0. 2% <0. 35% >89dB . 775 Volts 20k ohms 10k ohms +0/-3dB <0. 2% +/-15dB 64Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz, 16kHz 115/230VAC 50/60Hz 160 watts max. 3. 5 inches (89mm) 10. 2 inches (259mm) 11. 4 inches (290mm) 15 lbs. (6. 81kg) Power Requirements Power Consumption Dimensions Height (2 rack spaces) Width Depth Weight 9 WARRANTY BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL 1. [. . . ] Such evidence may consist of your sales receipt from an authorized BIAMP Systems dealer. Transportation and insurance charges to and from the BIAMP Systems factory for warranty service shall be your responsibility. This warranty will be VOID if the serial number has been removed or defaced; or if the product has been altered, subjected to damage, abuse or rental usage, repaired by any person not authorized by BIAMP Systems to make repairs; or installed in any manner that does not comply with BIAMP Systems' recommendations. Electro-mechanical fans, electrolytic capacitors, and normal wear and tear of items such as paint, knobs, handles, and covers are not covered under this warranty. 5. [. . . ]