mr-b Posted May 23, 2022 Share Posted May 23, 2022 Hi I've noticed that some tracks produce slight distortion on one of my Khorns (1987 with K55M squawkers, upgraded Crites CT-125 tweeters and B&K AK-3 crossovers). The distortion is a slight harsh glassy sound on some piano tracks and, bizarrely, Kraftwerk. I tried Alan Parker's excellent Soundcheck CD but couldn't pinpoint the frequency. I then swapped crossovers, amps, cables etc. and the issue follows the K55 squawker driver. Is it new driver time or is there some maintenance that might work - aka "Klipsch K55M Overhaul" at If it's new driver time then what are things that I could be looking at for possible upgrades (possibly horn too)? Oh and I'm in the UK so shipping parts may be rather expensive than normal! Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted May 23, 2022 Share Posted May 23, 2022 14 minutes ago, mr-b said: K55M squawkers The black plastic cap on the back of the K-55M driver can sometimes buzz. The problem can usually be fixed by applying a bead of silicone around the edge of the black cap. 2 Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted May 24, 2022 Share Posted May 24, 2022 I would check all of the horn to cabinet screws and make sure that they are nicely hand tight. Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 24, 2022 Share Posted May 24, 2022 @mr-b -could be a host of things including static , place the driver on a rubber mat , discharge yourself - -worn or loose gasket between the horn and driver -inspect - tighten --loose top plate screws , would be odd , but it does not hurt to check ...if all is tight , do not tighten any more - if screws are loose , loosen all screws ,then re-tighten in a cross pattern and stop when you feel resistance , -same with the plastic bezel at the rear of the driver ,check it , they do come unglued -dirt in the Voice coil gap can affect the sound , remove the top plate gently , blow air in the VC gap, then use a sticky tape all around the gap and blow air at a distance from the VC -then re-assemble -worn diaphragm , or damaged leads -check the solder on the diaphragm leads , and add if required . -finally inspect the bug screen of the driver - Quote Link to comment Share on other sites More sharing options...
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