R/EQ -150 Owner's Manual
Operating Your R/EQ-150
Adjusting the R/EQ-150 Level Control
Once you have installed the R/EQ-150 into your system, set all its frequency controls to their center detented positions. Next, set the volume control on your preamp or receiver to a comfortable level. Finally, adjust the level control on the R/EQ-150 so that the relative output level through the speakers is the same when its bypass switch is switched in and out. This establishes a “unity gain” position. You may boost or cut the overall level of the R/EQ-150 with this control as desired for best signal to noise performance.
Bypass Switch
The bypass switch is a handy way to compare music with and without equalization. In the on (depressed) position, the signal from the preamplifier is routed around all of the equalization circuits while leaving the level control active. This allows you to instantly compare between flat and equalized settings without having to individually readjust the frequency controls to flat. An LED alerts you to the bypass status.
| R / | E Q - 1 5 0 | R o o m | E q u a l i z e r | | | |
| | 1 20 Hz | 2 . 5 kHz | 6 kHz | B y p as s | L evel |
4 0 H z | 8 0 Hz | |
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Drawing # 2: Front Panel Controls
Adjusting the R/EQ-150 Frequency Controls
Before adjusting the R/EQ-150 frequency controls, make certain that all tone controls, loudness buttons, and other filters on your preamplifier or receiver are set at their flat or bypassed positions. This helps avoid interaction between multiple equalization circuits that can adversely affect the sound or overload your amplifiers or speakers.
40 and 80 Hz Low Bass Adjustments:
The 40 Hz and 80 Hz controls have an adjustment range of ±8 dB and a frequency bandwidth of one-half octave. Turning these controls clockwise (boosting) adds very low bass so often missing from smaller or in-wall loudspeakers. Turning these controls counterclockwise (attenuating) can help reduce unwanted low frequencies that may contain inaudible information that can waste amplifier power and strain woofers. Attenuating these controls can also help tame boominess when speakers are mounted near room boundaries where bass is acoustically reinforced. The 80 Hz control will have a greater audible effect simply because most music contains more information at 80 Hz than at 40 Hz.
