Alexander

The original k52h drivers used in the klf-20/30's are actually the exact same being used in the k53/57/61k (and others). All you would need to be able to use them one would remove the four screws that hold the horn mounting flange of each magnet assembly and change them out.. The diaphragms are interchangeable as well, but I would use them in matched pairs (i wouldn't use one OEM KLF & one from another series like a k61k) . Or better yet if you find you need to replace one get a new pair if you can afford them. Also avoid using the Ti mid version. The gasket with the larger open hole is the OEM for the KLF's. The one with the smaller opening is what you would get if you were to order new replacement gaskets from Crites.

That price point puts the CW IV's out of reach for me

If you want to keep your C7 then consider: recap all three xovers Crites Ti diaphragms & re-oil all three of your k79k tweets Crites a55g's to replace your OEM k52H mids

https://lakeland.craigslist.org/ele/d/lakeland-hi-end-hi-fi-gear-audiophile/7303812092.html

New price $200

https://fortmyers.craigslist.org/lee/hsh/d/fort-myers-klipsch-speakers/7289279996.html

https://miami.craigslist.org/mdc/ele/d/miami-klipsch-speakers/7297918470.html

https://miami.craigslist.org/brw/ele/d/hollywood-klipsch-kg45-pair/7300167623.html

https://orlando.craigslist.org/ele/d/orlando-klipsch-chorus-ii-tower-speakers/7300338689.html

My T-5000s has two pieces of foam per cabinet

What are the length and gauge of your speaker wires? Your avr-x3100w is rated at 105wpc into 8 ohms, 8 ohms should be the reference point to measure all amps. I have been running my avr-x3200w since ~2015 driving klf-30s & klf-c7 + various surround speakers with out a hitch. I does get warm but no more than the rest of my gear. Did you by chance have your avr in a closed-in environment like a cabinet? Or say having less than ~3“ of open air space above the unit? Emotiva suggested I have 12” of open air space min above my xpa-1s – granted we are talking about a lot of power but I think you got the idea. Would like to hear how you like your Crown amp.

I should point out that another member here found the screen under/behind the dust cover had some how got loose and it would buzz from time to time.

I recently went through the same ordeal with a klf-30 woofer. I had found the dust cap was loose & the plastic ring was also causing a buzz. It turned out two of the four woofer mounting screw holes were 'soft'. So it appeared they did not hold the plastic woofer ring down tight enough. So all drivers were removes on both speakers and used wood glue and toothpicks to “rebuild” all screw holes. And in my case that was the end of the problem. Note: I had reglued the cabs seams ~two years before.

https://boston.craigslist.org/gbs/ele/d/framingham-klipsch-kp-301-musicians/7290720813.html

https://boston.craigslist.org/gbs/ele/d/dorchester-center-used-vintage-klipsch/7281511591.html