American Audio PSW 15TM Owner's Manual download pdf (Page 5)

For accessories and information visit www.polkaudio.com 5

Q: “ Why does my system hum?”

A: “

Because it doesn’t know the words.”

This is what passes for humor in the audio business. Here’s the real answer: If you have any electrical (50/60Hz) hum in your system you’re

going to hear it clearly as soon as 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 electrical 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 attaches to your coaxial cable where it plugs into your VCR (or television). They’re simple to install and usually solve the hum

problem. Find 75 ohm ground loop isolators at your audio dealer, Radio Shack stores, or online at

http://shop.polkaudio.com.

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, contact Polk Audio Customer Service 800-377-7655 (US & Canada), 410-358-3600, 9am-6pm EST,

Monday through Friday, or email: [email protected].

TECHNICAL ASSISTANCE OR SERVICE

If, after following these hook up directions, you experience difficulty, please double-check all wire connections. Should you isolate the problem

to the speaker, contact the authorized Polk Audio dealer where you made your purchase, or call Polk Audio’s friendly Customer Service

Department at 1-800-377-7655 (calls from US or CAN only), 410-358-3600 9am to 6pm EST, Monday through Friday. You may also contact

For more detailed hook up information and manual updates, visit:

http://www.polkaudio.com/home/products/subwoofers/psw303

http://www.polkaudio.com/home/faqad/

For recommended accessories (including speaker stands, brackets, accessories and exclusive Polk Audio logowear), visit our Webstore:

http://shop.polkaudio.com

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American Audio PSW 15TM Owner's Manual Page 5