[nightheron]

I have an 11 year old harmon/kardon AVR 5 receiver. A couple of weeks ago my subwoofer (a poor quality 10" JBL) started making continuous loud popping noises. When I opened it up to see if there was anything wrong with the circuit board I noticed that a piece of it had burned. That was fine. It was 11 years old and burnt circuit boards on that particular model were common problems, so I decided to just buy a new subwoofer. I bought a Klipsch Sub-12, plugged it in and I am getting minimal sound out of the subwoofer regardless of what the volume on the subwoofer or the receiver is set at. Not only that, but at random intervals I either get a very loud house-rattling "boom" or it will start making continuous popping noises like a popcorn machine just like my old one did after it fried. I can't imagine this new subwoofer is bad too, so I have to wonder if the subwoofer connection on the receiver has fried? The receiver works fine with the other speakers. The subwoofer was connected and set properly as far as I know, and it was connected with a good quality cable. Any ideas what could be going wrong here? Do you think it is possible that my old subwoofer damaged my receiver when it burnt?

I am going to take the subwoofer back to the store this week to have them test it out, which would answer my question, I suppose, but I'd like to have some insight from people experienced with home audio equipment before I go (I am like the "average joe" when it comes to this stuff).

 

[hugh]

My guess is your receiver damaged the sub-woofer. I've never heard of a subwoofer, that was properly connected, damaging a receiver.

 

[ScaryBob]

If there is a standby switch, use it to disable standby. The sub not powering on from standby is a common problem with Klipsch subs and some receivers.

I've never heard of a subwoofer, that was properly connected, damaging a receiver.

If the sub board fried, it could have also fried the LF output on the receiver. I've never heard of an A/V receiver damaging a sub either.