FRONT PANEL CONTROLS AND CONNECTIONS
GEQ 131/131LF
Single Channel 31 Band Graphic Equalizers
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| 8 | 6 | 4 |
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| 5 | 1 | |||
20 | 25 | 31.5 | 40 | 50 | 63 | 80 | 100 | 125 | 160 | 200 | 250 | 315 | 400 | 500 | 630 | 800 | 1K | 1.25K | 1.6K | 2K | 2.5K | 3.15K | 4K | 5K | 6.3K | 8K | 10K | 12.5K | 16K | 20K |
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| +12 | 10 |
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| +6 |
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| GEQ 131LF | |||
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| +3 |
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| 0 | 5 |
| 31 BAND GRAPHIC EQUALIZER | |||
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| 40 |
| 15K | BYPASS RANGE | ON | |
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| 15 | 60 | 7K | 22K |
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| OFF | |
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| 10 | 250 3K | 50K |
| POWER | ||
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| 0 | HI PASS | LOW PASS |
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| LEVEL | CLIP |
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| 2 | 3 |
| 8 | 6 | 4 |
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| 5 | 1 | ||||
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GEQ 215/215LF
2 Channel 15 Band Graphic Equalizers
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| 6 | 4 |
7 | 2 |
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| 5 | ||
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| 6 | 4 | 1 |
2 |
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7 | 5 | 4 | 7 | 5 | 4 | 1 |
2 | 6 | 2 |
| 6 | ||
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| 3A | 8A |
| 3A | 8A |
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GEQ 231
2 Channel 31 Band Graphic Equalizer
1.Power Switch
To turn the equalizer ON or OFF, press the upper or lower portion of this button.
CAUTION: Always turn on your equalizer BEFORE your power amplifiers are turned on, and always turn off your equalizer AFTER your power amplifiers have been turned off.
2.Input Level Control
This controls the level of signal to the equalizer. It is capable of +/- 6dB of gain.
This control is used to adjust for variation in input level to the equalizer channel, or to compensate for the equalization applied to the input signal. Turn this control down if the CLIP LED illuminates steady (meaning too strong an input signal). Unity gain can be set by turning this knob to its center detent position.
3.
3A.
4.Filter Range Switch & Indicators
The gain range of the filter sliders is switchable (as a group) from
7 | 2 | 3 | 8 | 6 | 4 | 1 |
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| 5 |
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5.In/Out Bypass Switch & Indicator
This switch inserts or removes the equalizer channel from the signal path. The red LED lights when the switch is depressed to indicate that the unit or channel is in the equalizing mode. In the bypass mode, the signal is routed from the input directly to the output. The bypass function is FET switched to prevent switching transients when inserting the equalizer into the circuit path. Use this switch to compare equalized and unequalized material. When there is no power to the unit, the equalizer automatically reverts to bypass.
6.Peak/Clip Indicator
This red LED illuminates if any section of the equalizer is within 5dB of clipping. Occasional blinking of this LED is acceptable, but if it remains on more than intermittently you should turn down either the equalizer’s level controls or reduce the output level of the preceding component to avoid audible distortion.
7.Filter Level Slider Controls
Each one of these linear potentiometers will boost or cut its noted frequency by either
8.
This filter rolls off higher frequencies. This is useful for reducing hiss or sibilance from a signal. Its range is adjustable from 3KHz to 50KHz.from 3KHz to 50KHz.
8A.
16KHz, 12 dB/octave LPF. LED lights when activated.
6