Polk Audio PSW 650 - Manual (Page 11)

SUBWOOFER ADJUSTMENTS
SUBWOOFER LEVEL CONTROL
Subwoofer level is adjustable via the
knob located on the front of the sub-
woofer under the logo pod. Play a piece
of music that has an average amount
of bass content. Start with the knob set
to “5” and the “bass boost” switch set to
0. Adjust by ear using a wide variety of
CD and video sources. Adjust for deep,
powerful bass without “boominess.”
VARIABLE LOW PASS CROSSOVER
(FIGURE 10)
This control adjusts the frequency range
over which the subwoofer operates. This
control only affects signals that are sent
through the line level “IN” jacks and the
speaker level inputs. It has no effect on
signals fed into the LFE input. When
using smaller main speakers, the upper
range of the control will probably yield
the best results. With larger speakers,
the lower end of the control range
will probably sound best, but always
let your ear be the final judge. After
setting subwoofer levels, you may want
to experiment with this crossover fre-
quency setting. Turning the knob up
from the recommended setting will add
more “warmth” to the bass and lower
mid-range, possibly at the sacrifice of
bass “tightness” and midrange clarity.
Turning the knob down from the recom-
mended setting will make the bass
and lower midrange sound “thinner.”
Experiment and set this control to taste.
SWITCHABLE BASS BOOST (FIGURE 10)
In most cases, this switch should be
set to “0.” If you have hooked up the
subwoofer from a subwoofer output or
pre-out jacks and cannot get enough
bass output even with the subwoofer
level control turned all the way up,
switch to the +3dB position. In typical
11
OPTION #4
This is the best option to use in stereo
or Dolby
® Pro Logic ® systems with pre-
out/main in jacks and small speakers.
Connect the preamp output jacks to
the left and right inputs of the PSW650
with high quality RCA cables. Connect
the left and right outputs of the PSW650
to the power amp inputs (Figure 9).
The L&R outputs of the PSW650 are
high-pass filtered and will prevent bass
frequencies below 80Hz from getting
into the front amplifier and speakers.
This is desirable if you are using small
speakers. If you are using large speak-
ers and you want them to play bass,
do not use this option.
AC POWER
The PSW650 has a built-in power ampli-
fier and must be plugged into a standard
household 110-120V AC power source in
order to operate.
The power switch has three positions:
“On,” “Off” and “Auto” (Figure 10). In
the “Auto” position, the amplifier will
automatically turn on, and the green
pilot light on the front of the subwoofer
will illuminate, as soon as the speaker
senses a signal coming from your elec-
tronics. The amplifier and the green
pilot light will turn off approximately 15
minutes after input signal ceases. In the
“On” position, the power amplifier will
operate and the green pilot light will
illuminate until the switch is set to “Off”
position or the AC cord is disconnected
from a power source.
10
FIGURE 9.
FIGURE 10.