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Is it normal to hear a low-pitched hum comming from my subwoofer when there's no dvd or cd playing through it? It's annoying and makes me think I have something set up or wired wrong.

I've been frustrated in researching the answer to what must be a pretty basic question about speakers for my home theater. Specifically, for my LR and RR surround sound "satellite" speakers, I obvously have two RCA jacks in the back panel of my SONY receiver for connecting these speakers and...

Would a Bose Acoustimass Powered Subwoofer be compatible with my Sony-based HTsystem, or is it proprietary to the Bose Acoustimass system ?

I have a long run of speaker wire in which both wires are identical ... no markings that I can use to establish + and -. Is there a method using a battery to send current down the one of the two wires so that I can figure out when I have both ends of the same wire in order to establish polarity?

If the amplifier inside my powered subwoofer cabinet is blown, how would it work if I bypassed the amp completely and connected directly to the speaker itself? In effect, converting my powered subwoofer to a NON-powered subwoofer.

I hooked up my KLH powered subwoofer to my old Phillips home theater system using the high-level, two-wire inputs, and it sounded great. For awhile. After the music CD that I was listening to ended, I noticed that there was a low-pitched hum coming from the subwoofer. I tried playing the CD...

I'm setting up a HT systme for the first time. The problem I'm having is that I'm getting the "No Signal" message from my TV. I am using HDMI connections between the cable box, Blue Ray, receiver and TV. The Blue Ray player to TV works fine. The receiver is showing the "auto detect" mode is...

Would using my existing 4-ohm home theater speakers with my new receiver that recommends 8 to 16 ohm speakers damage the speakers or the receiver? Or would they work OK, but not optimally?

I have connections on the back of my KLH powered subwoofer that I do not understand how to use. I have RCA jacks marked "low level" input and out put and I also have terminals labled "high level out to speakers." (See photo attached.) Can anyone tell me how these outputs can be used...