Suggestions for an integrated upgrade please

When you ask for input for an upgraded integrated to match your speakers, you would hope that you would get feedback on what amps would work with your speakers, not just amp feedback. I had your speakers over 20 years ago and not just any amp will work with them, it doesn’t matter much about the efficiency of the speaker to some degree.

With your nht’s you have 2 parts of the speaker that I treated differently, the speakers on the front and the 12” woofer. 
 

The NHT tweeter is a metal dome type and you need a warm sounding amp to tone it down. If you look at most smaller tube amps, they will be fine for the front panel speakers but will not control your woofer, your will get more sloppy bass and the volume won’t be inline with the other speakers.

My suggestion (I actually did both ways) is to get a good quality tube amp or warm sounding SS amp for the 3 speakers on the front baffle (maybe the rouge Cronus magnum with the kt120 tubes or a McIntosh 6500 type integrated) and then get the nht’s sa-3 amps for the woofers with the volume control to match woofer output to the other 3 speakers. In a small room, it’s tough to get the woofer output to match the output of the other 3 drivers if you go with a under powered amp, which brings me to my other recommendation:

Get a large warm sounding amp that will control the woofer and tame the tweeter. The McIntosh 6900 was a good fit back when I had the speakers. I also went the separates route with the odyssey monoblocks with a classe preamp.

Goid luck

@jerryg123  said

” AH any of the Qualiton Integrated but that will be a stretch with you budget.

With those innefficant speaker I would stay away from any Raven and look at Rouge even PrimaLuna.”

+1

@ghdprentice said

” Audio Research VSI75 if you can find a used one. Or they just released the i50. That should be enough power if you don’t go for really loud rock. Incredibly natural musical equipment. “

Another +1

Amps make L & R, no more.

ALL Imaging is Phantom.

L & R starts in the studio, goes thru .......

It seems you do not want to hear it, but like others, I suspect your Imaging disappointment comes from the chain feeding the amps, 

A super-integrated is the NAD M33. It's well worth a look. New is $5500, but you can find it online for much less. It's excellent and includes DAC, streaming, phono.

For everyone complaining about the source, he has a Singxer Su6 that seems to have its own clock. The digital signal should therefore be reclocked already when it gets to the dac. I don't think another streamer will improve the sound much.