"Warm Sounding" Solid State Amplifiers

The NAD is the great sounding Amplifier. Just replace stock jumpers with the Cardas jumpers. It will sound a way better
then any Simaudio Int.Amplifier from NEO Series.

The NAD C356DAC with the Cardas jumpers is what you looking
for. It sounds better then then Bryston B60. At least with
the Focal Speakers.

I am going to disagree with NAD Master series. I have owned the M2 Direct Digital Amplifier and I would not classify it as a warm sounding amp but more technical. I had it with my PSB Synchrony Ones speakers (it was a nice match) and then with Tetra 606's speakers (absolutely amazing). I think the M2 is a great integrated and I wish I had not sold it. But to answer your question, as others have suggested Class A may get you closer to what you are looking for. For Class A/B what about Naim?

you have not really listed a price range. so this might not be a choice for you. but I would suggest trying to listen to a used darTZeel NHB-108.....which can be purchased in the $10k-$13k price range. they are $25k new. 10 years ago I switched from tubed Tenor to darTZeel (I now have the dart 458 monoblocks) since it had the breath-of-life of tubes, that always listenable smooth extended treble, and the low noise and amplifier grip of solid state. read about the darTZeel and you will find legendary swiss build quality, but mostly about it's lack of global feedback and low parts count in the signal path. and it's full bodied sweet midrange and great micro dynamics and lively sound. no grain, or etch, or brightness. just music.

best wishes in finding the right amp and I hope you get a chance to listen to the dart.

I always liked B&K,McCormack DNA series and Belles for sounding tube like to me.
If you get a chance give them a listen if you can; what speakers are you driving?