stilespj Posted March 16, 2014 Share Posted March 16, 2014 This issue has bee posed many times already, I know. A friend has a pair of KSP-400 and one of them is making a loud hum / buzzzzing. I told him that if I can get hold of a schematic of the speakers and amp, I'd be more than happy to repair them. Tracing out things to created my own schematic would be very time consuming and I do not want to do this if I don't have to. So, does anybody have a PDF of the KSP-400 schematic they could email me? I have e-mailed Klipsch support twice requesting a schematic but I have yet to receive a reply. Any help in this regard would be appreciated. Thanks, Paul Stiles stilespj@spamcop.net Quote Link to comment Share on other sites More sharing options...
T2K Posted March 17, 2014 Share Posted March 17, 2014 There's a link posted here somewhere. I think fini poster it. Keith 1 Quote Link to comment Share on other sites More sharing options...
mustang guy Posted March 17, 2014 Share Posted March 17, 2014 Welcome to the forum! If you want my expert opinion, I think there are two things wrong. The buzzing is coming from a bee hive inside the speaker. Be careful! The humming is because the speaker doesn't know the words. Let me know if that helps, Craig 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted March 17, 2014 Share Posted March 17, 2014 (edited) Here are 2 specifically related fix info. There came up year 2010 and 2013 threads.If you do not receive reply soon, I would call. https://community.klipsch.com/index.php?/topic/145978-attn-technical-gurus-amp-assistance-needed/?hl=%2Bksp400+%2Bschematic Credit to *T2K for the info. in his post above. Edited March 17, 2014 by billybob Quote Link to comment Share on other sites More sharing options...
anarchist Posted March 17, 2014 Share Posted March 17, 2014 (edited) Here are 2 specifically related fix info. There came up year 2010 and 2013 threads.If you do not receive reply soon, I would call. https://community.klipsch.com/index.php?/topic/145978-attn-technical-gurus-amp-assistance-needed/?hl=%2Bksp400+%2Bschematic Credit to *T2K for the info. in his post above. Its easier than that. The threads will point you to the problematic caps; you can choose to replace just them, or for pretty much the time you invest in pulling the boards and a few dollars, you can install all new caps. Once and done. My KSP's never sounded better. An added bonus: The schematics may not be correct for your "specific" speaker and you may find jumper wires etc. that the schematics don't account for. Pulling the boards is the simplest solution to getting it right (and ordering the right parts.) Edited March 17, 2014 by Anarchist Quote Link to comment Share on other sites More sharing options...
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