JBL rmc User Manual

Many engineers will want to use the LSR6312SP subwoofer in stereo or surround activi-
ties using passive loudspeaker systems such as the LSR6332. There are two ways you
can do this:

Method One
Feed the Left, Center and Right channel power amplifiers through the three sets of signal
inputs and outputs on the rear panel of the LSR6312SP, as shown in Figure 17. This will
insert 80 Hz high-pass filters ahead of the external power amplifiers driving the Left,
Center and Right channels. At the same time, the LF content of each input will be low-
passed at 80 Hz, summed, and fed to the integral subwoofer amplifier.

1. Taking Measurements, refer back to LSR6328P Taking Measurements section on page 8

2. After you have made these connections, play Track 2 over the center loudspeaker and 

set the volume level to read -7 dB on the sound level meter.

3. Now, play Track 4 and adjust the level at the subwoofer to achieve a reading of -7 dB 

on the sound level meter. We suggest that you make this adjustment on the rear panel 
of the LSR6312SP by engaging Switch 1 (S1) and using the makeup gain trim control.

4. You are now ready to play Track 3, to check for any over-readings. Make any level 

adjustments if necessary by engaging Switch 1 (S1) and using the makeup gain trim 
control, and then proceed to play Tracks 4 through 26, making your entries on chart 
paper.

5. Analyzing Your Measurements, refer back to LSR6328P Analyzing Your Measurements 

section on page 10 and 11.

6. By now, you are familiar with the equalization procedure. Enter the frequency, level and 

width values at the bottom of the chart and proceed to make the RMC settings on the 
rear panel of the LSR6312SP.

7. Recheck the overall sub and main system balance by playing tracks 2 and 27 as well 

as a track of music that you know well. Make any small changes in subwoofer balance 
that seem appropriate.

L  in

R  in

Source

L  out

R  out

out

out

Right

Left

in

in

amplifier

amplifier

Subwoofer