I have some Klipsch Chorus and some KLF-30s. Ive always thought the Chorus to be gutless down low and the Klf-30s to be only a little better. Ive been powering them with my yamaha dsp-a1 (110wpc) from 2000-2010 and then with an onkyo tx-nr3007 (140wpc) from 2010 to present. Recently I put the onkyo in bridged mode to get around 230wpc...still loud but nutless.So then I tried an Adcom 555 (200wpc)....no difference. I have 2-18" subs so I havent been missing bass but wondered why these big ole speakers didnt have any. I just bought the oldest/cheapest/junkiest pro amp you can probalbly get. It is a Crown Power Base 2 that looks like it was pulled out of the trash...80 bux on craigslist...:"what the hell" i thought. It is 325wpc and im using some radioshack rca to 1/4plug adapters. OMG!!!! on this amp these speakers ROCK...I mean hard. Gone is any brightness,,,,and the bass is wonderful. Of course this old amp has a fan that sounds like a blow dryer going in my livinroom but i dont care...these speakers have never sounded this good. Had I known this, I would have bought a pre-processor to decode DTS-MA.. Dolby HD and other formats then bought a couple of pro amps.I know a lot of you guys like the old rock and roll but when I say bass I mean the low stuff that aggravates you in cars at the redlight....these speakers now produce that. They are so clear and just sound full and STRONG. Yeah i saw the light...it must be the low ohm capability of the amp.....just AWESOME!