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optimal phase tuning.
MAINTAINING THE APPEARANCE
OF YOUR PSW1200
Your new speaker cabinet is finished in
woodgrain vinyl that can be dusted or
cleaned with a moist soft cloth. Avoid
harsh detergents and cleaning fluids,
they can permanently damage your
speaker’s finish. Remove grilles and
gently vacuum the dust.
Q. “WHY DOES MY SYSTEM HUM?”
A. “It doesn’t know the words.”
This is what passes for humor in the
audio business. Here is the real answer:
If you have any electrical 60Hz hum
in your system, you are more likely
to hear it once you hook up your
Subwoofer. Most hum problems are
caused by ground loops. That is, the
electrical grounds of the components in
your system are not at the same electri-
cal potential. A very common ground
loop source is cable TV. Disconnect the
coaxial cable from your TV and/or VCR.
If the hum goes away, the cable is the
ground loop villain. In that case, you
need a 75-ohm ground loop isolator.
This device is about the size of a pen
and is attached to your coaxial cable
where it plugs into your VCR (or televi-
sion). You can obtain this device from
some audio dealers, Radio Shack stores,
Zantech (1-800-843-5465) or Channel
Plus (1-800-99-5225).
Ground loops and hum can also be the
result of faulty electrical wiring in your
home. Consult a licensed electrician to
evaluate and, if necessary, repair the
AC wiring in your home. Light dimmers
also tend to introduce noise into audio
systems. Remove them.
If none of our suggestions work for you,
call our customer service number shown
below.
TECHNICAL ASSISTANCE
OR SERVICE
If, after following the hook-up
directions, you have trouble, please
double-check all wire connections.
If the problem is that you are not getting
enough bass, make sure the AC cord is
connected to a live AC power source and
that the power switch is set to the “on”
or “auto” position. Should you isolate
the problem to the speaker, contact the
authorized Polk Audio dealer where you
made your purchase. Authorized Polk
Audio dealers are the best source for
advice and assistance.
Our cheerful customer service repre-
sentatives are happy to answer your
questions and provide fast, friendly
service. In North America call (800)
377-7655, Monday through Friday,
9:00 AM through 6:00 PM Eastern time.