Better Amp for Cornwall IV's...

get someting very expensive. 
love don't pay the bills
and electricty don't grow on trees
honeechild

Denon PMA-1600NE arrived double-boxed from Music Direct on 1/15/21.  Fed-Ex tried to deliver it the day before but yours truly was sleeping in and missed it.  I apparently also missed that a signature was required for delivery.  My bad.
I've got it in the cabinet and everything is purring along nicely.  The amp is amping and the speakers are speaking.  I also moved speakers and subs a bit, so I had to go through sub set-up again.  Integration is pretty good now but I think I can improve it so I plan to hit it again tomorrow.  I've got to keep punching at it and punching at it. :)
The first thing I've noticed is the gain of the amp.  Or maybe it's just the volume control.  I have yet to get the volume up to nine o'clock.  There, it's already LOUD.  Even with headphones, I'm only using a tiny bit of the knob's range.  I haven't noticed any noise issue yet, but I also haven't done the ear-to-the-tweeter test, either.
Oh, I guess I could report that the sound through the headphone jack was quite good, and that fit and finish was really nice.  It seems to be very solid and well-built.

I haven't really pushed the amp at all yet, but after she gets run in for a few days I'll start pouring the coal to her and we'll see what happens.

@ coachpoconnor , I have an XA25 and have been pondering jumping the gun on theC4s. What’s your experience with these speakers? And, I was also considering Wilson's Sabrina (used) - Not the same price point (about $10K), but the dynamics seem to be there based on the reviews I've read. Perhaps not as dynamic as the C4s, but still.

From the three amps I have, Audio Research LS2 + Parasound A21, Willsenton R8 and Muzishare X9, The X9 sounds best, more musical on all types of music, especially vocal and jazz with stock tubes without fully burn-in on the third day for the CW IV + REL HT/1508. CW IV needs a lot of power is a misconception. The X9 gets the temp right, yield deep and tight with definition bass than the R8 and even better than LS2 + A21. 

CW IV owners should give SET 300B type amp a try. 

@canibefrank get someting very expensive. love don’t pay the bills and electricty don’t grow on trees honeechild 

Jadis DA88S integrated

neither.  try a rogue audio cronus magnum.  perfrct blend of tube sound and needed output power 100 wpc for you speakers

neither. try a rogue audio cronus magnum. perfrct blend of tube sound and needed output power 100 wpc for you speakers

Cornwalls don't need anything remotely close to 100 watts. I am driving them as loud as I care to listen (which is pretty loud sometimes) with 12 watts per channel or single ended EL34 tube power.

Oz

I've heard a number of A'goners recommend Pass as good amps for big, old school type speakers. Maybe worth a listen.