OEM PS-12 Owner's Manual
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O W N E R ’ S M A N U A L
PS-12
S E T U P (continued)
PS-12 Controls
Fine Tuning the Controls
The PS-12 subwoofer has thee variable controls for tailoring its output to the room and to the primary
speakers (also known as satellites). These controls are Level, Crossover Frequency, and Phase. The control
with the most audible effect is the Level control, followed by the Crossover Frequency, and then the Phase
control, which has the least audible effect.
The following legend shows graphically how each control affects the audio signal.
Level and Frequency
Begin with the subwoofer’s Level control all the way down and the Frequency adjustment set to 120Hz.
With the Frequency control in this position the woofer will output higher frequencies that will likely be
duplicated by the satellite speakers. “Satellite speakers” is a term used to describe the primary listening
speakers that cover the frequency range above the subwoofer’s.
Use familiar music with strong bass content and increase the Level control until the bass passages sound
robust or slightly exaggerated. Then reduce the Frequency control to blend the subwoofer with your main
system speakers. We have found that most speakers with 6” to 8” woofers blend well with the crossover
set somewhere between 50Hz and 80Hz.
Readjust the Level and the Frequency controls (up or down) as necessary until the bass sounds full,
extended, and natural. Use multiple musical pieces to test the system while ne tuning the controls. If it
sounds like your subwoofer is always producing the same bass note with different recordings it is possible
that the bass level is adjusted too high.
Phase
When adjusting the phase, use familiar music with strong bass content. The phase adjustment primarily
affects the frequencies where the subwoofer and the satellite speakers overlap (frequencies near the
crossover frequency).
Rotate the phase across its range and listen to the balance and strength of the mid-bass frequencies. Tune
the phase adjustment so that these frequencies are detailed and distinct. If they become overly strong it
may be necessary to reduce the subwoofer’s crossover frequency and/or input level a little. The effect of
the phase adjustment can be subtle and it may be necessary to take some time to become acquainted with
the sound before changing the adjustment.
F re quen cy (H z)
S P L
(d B )
F re qu en c y (H z)
S P L
(d B )
P ha se (D eg ree s )
S P L
(d B )
Level Crossover Frequency Phase
A)
B)
C)
A)
B)
We recommend the following method as a starting point for ne tuning the PS-12 subwoofer.
Note: SPL is “Sound Pressure Level” (Volume)