Klipsch Heresy IV

Yep what that guy is saying about efficiency in the video makes sense.  You can't get more bass out of essentially the same size package without losing some efficiency so the I would tend to lean towards IIIs with lower power amps.

I heard IVs with a beefy Anthem solid state amp and that was a very good combo.

If you want flat extended bass off a few watts you need big speakers.  No way around that.  It's the laws of Physics.

Having heard the Heresy IVs, and assuming the new JBL have similar character as their classic ancestors, which one prefers would largely come down to personal preference, though Klipsch are inherently more tube amp friendly and efficient by design whereas those JBL less so and probably designed with SS amplification in mind.

So like with pretty much all things, it all depends.

Aren’t Cornwalls designed to go up against the wall? Hence the name?

I spent about an hour with a pair at a local dealer today. They definitely have a unique sound and aesthetics to offer versus the competition.

The sound was pretty much as Mr. Hoffman describes in his review. This was off a sizable Anthem STR SS integrated amp, not tubes.

$3000 is a lot of money but I notice pretty much everything at the local shops has increased a good bit in price over the last 6 months or so. There are some very tiny speakers out there that can set you back a lot for what you get.   Most are 2-way not 3 like the Heresy's.

The unique thing with the Heresy’s as will be no surprise was the jump factor....these are way more efficient than most and a good choice for a very dynamic sound especially I would expect with a tube amp or smaller SS amp.

The aesthetics are unique....very old school but classy looking.

I played all kinds of music and recordings old and new, and they handled everything with aplomb. I had things going fairly loud most of the time and my ears survived quite nicely....not shouty or fatiguing even on poorer quality recordings.

They really jumped to life with better recordings like "Birds of a Feather", by Carribean Jazz Project. There was a nice realistic sounding liveliness to the xylophone which was miked very closely in this recording and you could precisely locate each strike left to right across the sound stage loud and clear .

"Everything in it’s Right Place" by Radiohead came through crystal clear and expansive with nice fullness but no flab in the bass.

These definitely offer a unique sounding option with a lot of audiophile appeal beyond just efficiency and dynamics.