Klipsch Heresy iv...Your experience.

The IVs arrived and clearly need some break-in time...however, they're beautiful and have some interesting differences as well they should since it's an entire re-design of the III. I used a Stereophile test disc to see how low they could go and the reviews are accurate, but since it's ported you actually can get sound all the way down to 20hz (when raising the gain of course)....the IIIs just make no sound below 40 or so, although I can't remember exactly where they just stop. I have a couple of subs though so no biggy for me. The mid horn looks like a total redesign with a shallower exit and those "tractrix" lumps (the tweeter seems to have those also). I'l certainly be making more comments about them, but note my first impression was how damn good my IIIs are...hoping the IVs warm up soon.

If the Heresy IV is anything like the CWIV, which it is, you will hear some major changes after a hundred or so hours. They will relax, the mids will smooth out, and the bass will fill in.

Oz

The mid horn in the IV is such a different design from the III...the IV is a far shorter driver throat attached directly to the Tractrix horn flare (with a little dust cap in there), where the III seem like a complicated long chamber throat with a weird looking long pointed phase thing entering the throat. Take one apart like I did and you’ll see...very interesting. All new speakers I’ve owned (and headphones, and pro stuff)  vary in break-in time but I’ll be patient...if they don’t sound somewhat better than my IIIs I’ll move ’em on, but they are beautiful speakers. Note the drivers on the IVs all use hex head bolts into "T" nuts instead of the wood screws for the mid horn and tweeter on the III, and the woofer on the IV uses all the attachment points unlike the 4 bolts used on the III's woofer. A little more upscale all around...they moved the crossover to the side of the cab to make room for the tractrix port.

I’ve never heard any of the Heresy versions, would be curious to know how the soundstage and imaging are given the shorter/wide size of the speakers.  Thanks

Great speaker. Up on stands with two or more subwoofers and you have a very serious system. Very close to SOTA for point source. Wilson, YG and Magico included!