Opinions on Nuprime vs D-sonic vs Red Dragon vs Class D Audio

Had the IDA-16 in for a trial and found it to be unlistenable during break in period and still harsh and dry treble after break in.   

Also got a chance to go head to head with some class AB amps vs. my NAD M12/M22 combo that I thought sounded pretty good and the class AB amps all sounded better.  They made M12 sound dry and analytical by comparison.  This was in a well damped dealer showroom that really lets you hear minute differences in gear.

I'm done with Class D.

Pick one with a 30 day return policy and don't buy in to the break in talk. If they needed to be broken in the amp maker would do this in advance. 

My Primare I32 integrated won out over an older Creek Classic 5350SE that was very well reviewed, a Belles Aria, and a Belles Soloist.

I realize that my humble integrated is not in the same echelon as high-end separates; however I believe that Primare is a company whose products employ some unique engineering and perform very well with about 24 hours of breakin. Notes just seem to appear out of nowhere and music is so enjoyable. On some of my better recordings it's like hearing a different, better version. (I won't say 'hearing them for the for the time.' That's bullshit.)

So you might want to add something like the Primare A60 to your list. I know how a list can grow and become paralysing; but I'm glad I took the time to listen to this product from a manufacturer I had never even heard of before. 

Just want to give a nod to Wyred 4 Sound (W4S).  I run a W4S DAC-2 straight into a ST-500 Mk II.  Got a "combo" deal from The Music Room through AGon.  I did a lot of reading (probably what you're doing) then became exhausted with all the research and opinions (there are lot, as i'm sure you've discovered).   So, I just took a dive in and am more than pleased.  Lots of oomph in my system but not bright.  Has been great for all kinds of music.  

The other reason I "invested" in W4S is that they are constantly offering upgrades to their existing products.  The upgrades are waaaaay more cost effective than purchasing a whole new X (fill in the blank).  When the upgrade bug bites or technology changes I can change with it.  

In the end, I think you can't lose out with what you're looking at.  

I like some of the ideas above where you can purchase something and send it back.  W4S does this too.  They are having what they call a "B-stock sale" and are offering pretty hefty discounts right now.  

Hope this helps.  Good luck.

Josh

@autre

I can’t give you opinions about how NuPrime compares to other class-D manufactures. But I can tell you that my NuPrime IDA-16 is one of the finest amps I have listened to.

As has been mentioned class-D has a lengthy burn-in process. My IDA-16 sounded powerful right out of the box but a bit rough. At about the 300 hour mark it started to open up and also started to refine and smooth out. Things progressed and improved steadily and then at about the 500 hour mark there was another big improvement; it opened up big time with the mids on up getting fuller and fuller and the treble smoothing out. From the lower mids down it’s one of the best amps I’ve heard.

Anyways, that’s a bit of my experience with NuPrime. Great sound, great build quality and excellent customer service.

Cheers,

Scott