raoul_duke Posted March 6, 2017 Share Posted March 6, 2017 I bought this Klipsch subwoofer (KSW-10) new around 1998. It's worked great for 19 years until last month. When I start watching TV or a DVD, I will usually (but not always) hear one or two loud "booms" in succession. It's not a part of the soundtrack. This happens about five minutes into the program but only if the sub hasn't been used that day. I'm getting settled into a show and out of nowhere it sounds like a heavy book hitting the floor from a top shelf. This never happened until recently and I made no changes to settings or setup. No sudden weather changes either. The sub still works, and I haven't heard it happen with music (even with a pipe organ CD.) I did try to turn down the level from '11' (yes, it really does go to 11) to '6'. It still happens and now more frequently. I searched Google, the FAQs and other forum posts and haven't turned up any answers. Has anyone run into this problem before? Thanks Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 6, 2017 Share Posted March 6, 2017 You can try another cable but your amp is probably starting to crap out. 19 years is a great run for a Klipsch sub plate amp. 1 Quote Link to comment Share on other sites More sharing options...
raoul_duke Posted March 8, 2017 Author Share Posted March 8, 2017 I'll try another cable, but I suspect it's more involved. I'm pretty handy with an ohmmeter and a soldering iron, so I'd like to attempt a repair. Do you know if there is a replacement amp for a KSW-10 from Edwards or other electronics supply? I read about replacing an amp - doesn't seem that hard, or am I wrong? 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 8, 2017 Share Posted March 8, 2017 Easy to replace yes Just some screws and wire connections. Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted March 9, 2017 Share Posted March 9, 2017 CECAA850 has stated it is most likely an amp problem which I concur. Replace it a plate amp or pro amp. I would leave the plate amp and bypass the internals and connect it to a pro amp. This is fairly easy to do and requires the least amount of work. Quote Link to comment Share on other sites More sharing options...
WMcD Posted March 9, 2017 Share Posted March 9, 2017 I say: try disconnecting the wire/cable feeding the signal to your sub after disconnecting power. Then let things sit overnight, and then start up the sub. (Does this have some sort of auto-on?) At least that way if there is a boom, you know it is not coming from your receiver. WMcD Quote Link to comment Share on other sites More sharing options...
raoul_duke Posted March 10, 2017 Author Share Posted March 10, 2017 (edited) Yes, the sub is set to "auto-on", so I hear the boom only when it gets a signal below 120 Hz and turns on from standby mode. I can flip the switch to just "on" and see if that replicates the noise. I'll try your procedure of letting it set overnight and see what we get. *** Update: After reading your comments, I tried the following: 1. Flipped the toggle switch to "on" from "auto"; watched TV as normal and it happened right away - this didn't tell me much. 2. Shut everything down and replaced the cord from the amplifier to the sub; it still happened - problem not the cord. 3. Turned the power back on and let the sub sit; I heard one boom without any input signal - problem is the amp. Now, where do I get the replacement part? Thanks for the help. I noticed right away my music lacks depth without the sub. No comparison. Edited March 10, 2017 by raoul_duke Update Quote Link to comment Share on other sites More sharing options...
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