Factor Electronics PRO-SUB12A Owner's Manual - page 4
Back Panel Operations and Connections:
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1. Speaker Level Inputs:
The PRO-SUB12A can be connected to your
system multiple ways. Connect the speaker
level outputs from your amplifier to the L/R
speaker level inputs on the PRO-SUB12A.
If you are using a mono amplifier you can
connect a single mono speaker level signal to
the L (left) speaker input. The PRO-SUB12A
speaker level inputs will accept signals from
4/8ohm stereo amplifiers and also 25/70volt
mono commercial amplifiers.
(TIP)
When using a mono 25/70V commercial
amplifier use the 4ohm amplifier output to
connect the PRO-SUB12A and run your 25/70V
speakers from the 25/70V amplifier outputs.
The PRO-SUB12A will not load down or lower
The reflected Impedance to your commercial
Amplifier. This can provide better bass response.
2. Speaker Level Outputs:
When connecting the PRO-SUB12A to an
amplifier speaker level outputs it is possible
to use the internal crossover built into the
PRO-SUB12A to roll off low frequency's to your
main left/right stereo speakers. This can produce
a cleaner tighter sounding system. This also
eliminates possible phase cancellations (dips)
and spikes in frequencies where both the
PRO-SUB12A and you main left/right speakers
are trying to produce the same lower frequencies
EXAMPLE:
Connect the L/R speaker outputs
From your stereo amp to the PRO-SUB12A
Speaker level inputs. Now connect the
PRO-SUB12A speaker level outputs to your main
L/R speakers. Set the FREQ control to approx
80Hz. Now the PRO-SUB12A will produce
Frequencies from 80Hz and below and your main
L/R speakers will produce frequencies from 80Hz
and above.
(TIP)
Check the rated frequency response of your
main L/R speakers and look at the frequency
graph (if available). Speakers may be rated down to
40Hz but may start to roll off steeply after 80-100Hz.
Set the FRQ control to the point where the frequencies
of your main L/R speakers roll off. This will produce
the best results.