I've been into high end audio for over 30 years. I have 2 large systems in my home with Harbeth M40.1s, Sterling LS3/6 speakers. Last week after watching and reading several reviews including Steve Guttenberg's review, I purchased the Cornwall IV. I've never been a fan of Klipsch speakers and to be honest the last time I seriously listened to one was back in the late 80's. When I listened to them back then, I thought they were great rock speakers but bright and piercing. It could have been the components that they were paired with or the set up but that was my opinion back then.
Fast forward to last week, I received the Cornwall IV and replaced my Sterling LS 3/6 BBC stand mounted speakers in my basement system. The rest of the components in the system include a Rega P10 turntable with Apheta 3 MC cartridge, Luxman EQ-500 vacuum tube phono stage, Etherregen with OCXO clock and LPS, Aurender N100H streamer/server, Innous Phoenix USB reclocker, Bryston BDA-3 DAC soon to be replaced by a Holo May KTE, Van Alstine FET Valve CF vacuum tube preamp and 600R hybrid power amp.
The Cornwall IV are nothing like what my previous perception of Klipsch speakers has been over the past 30 years. My Cornwalls only have about 125 hours on them but I already love their sound. These speakers are very sensitive to toe in and I think I have them dialed in to my preferences. The highs are not bright at all, and the midrange is smooth and natural. Piano, woodwinds, guitar all have a natural, like like sound quality. Voices are excellent and so is imaging. I have a REL S5 subwoofer that is currently turned off while I'm breaking in the Cornwalls. I don't feel the need to turn on the sub but I'll try it after my speakers are broken in. Of course, dynamics and bass impact are startlingly impressive. These speakers are not just great rock speakers that play loud, they are excellent with any genre. In fact, like someone else mentioned, they sound great at low volume levels.
My question to Cornwall IV owners is how many hours of break in do you feel it took to get them to sound their best?