User manual PARASOUND REQ150

[. . . ] Often room acoustics are challenging and compromises in speaker size and placement have to be made for aesthetic reasons. Consequently, the quality of sound may not be as good as intended. Your Parasound R/EQ-150 permits you to subtly adjust the frequency response characteristics in these situations and improve overall sound quality. [. . . ] Next, connect the left and right outputs of the R/EQ-150 to the left and right input jacks of your power amplifier. Connecting Your R/EQ-150 into a Tape Monitor Loop If your preamplifier or receiver has an unused tape monitor loop, connect the Rec/Out jacks of the preamp or receiver to the left and right input jacks of your R/EQ-150. Next, connect the output jacks of the R/EQ-150 to the Play/In jacks of your preamp or receiver. Press the preamplifier or receiver's monitor button to engage the R/EQ-150 Connecting Your R/EQ-150 into a Surround System Connect your surround processor's front left and right line or main outputs to the left and right input jacks on your R/EQ-150. Next, connect the left and right outputs of the R/EQ-150 to the left and right input jacks of your power amplifier. With additional R/EQ-150s, you can also this process for your center, surround, and subwoofer channels. Do not connect the R/EQ-150 to the processor's input to prevent overload and distortion. L R/EQ-150 Room Equalizer Parasound Products, Inc. San Francisco, CA USA CAUTION Fuse Holder R Input Output RISK OF ELECTRIC SHOCK DO NOT OPEN 120 Vac/60 Hz 5W Connect Input Jacks to line Output Jacks of Preamp or Play/Out of Receiver Tape Monitor Loop Connect Output Jacks to Input Jacks of Power Amp or Rec/In Jacks of Receiver Tape Monitor Loop AC Connector Drawing # 1: Rear Panel Connections -2- 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/EQ-150 Room Equalizer 40 Hz 80 Hz 120 Hz 2. 5 kHz 6 kHz Bypass Level 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. [. . . ] Attenuating this control can help remove some digital harshness and restore proper balance in very live rooms that may accentuate high frequencies. Reference Settings: Once you have adjusted your R/EQ-150, use the drawings below and use a pencil to mark the optimum settings for each control knob. That way, if the R/EQ-150 becomes accidentally misadjusted, you can easily return the frequency controls to their pre-adjusted level. [. . . ]