Amps that don’t impersonate space heaters.

I love my Proceed HPA-2!  Still around for 1200-1600.  Not bad for a dual monaural amp that retailed for 3500 20 years ago. 250/8 500/4 bridgeable.  I power a pair of DCM Time Frame 2000's to concert levels and neither amp or speakers break a sweat.  It also has somewhat more to offer HT as there is also a HPA-3 for folks that like all channels with the same amp characteristics.  I've owned mine now for 6 years and it does everything I could ask, and dream frankly.  Your system should make you smile and mine surely does!

@williamjohnston keep us posted if you audition any of the suggested amps

I bought a pair of used PS Audio BHK 300’s. They do run warm, but unless you run them hard, they don’t get burning hot. According to Paul, the P in PS Audio, the first 5 watts are class A. Because their input stage is tube, you can roll a couple of tubes and change the sound of you want or need to.

All the best.

Slam” is a very interesting attribute. What does it mean? Do you hear this “slam” when listening to live music? Is this “slam” an accurate representation of what’s on a recording or is it emphasis of particular frequency range that one component features over another? In most cases, “slam” is not real. Accurate reproduction/presentation is what I value in my system. This includes dynamics, tone, focus, layering, separation, soundstage. Coda is balanced pretty well in that regard. Imo

“Slam” is perhaps not the best descriptor for what I was trying to convey. To be more concise, my Yamaha seems to provide better woofer control and authority than the Coda 8 in the lowest two octaves, even with speakers that have a -3dB point of ≈35Hz. It wasn't notable until I swapped the Yamaha back into the system. Otherwise the No.8 did sound quite balanced, but then so does the Yamaha. So it doesn’t seem to be a linearity effect, but more to do with outright extension and damping factor. The Coda has more power on paper but the Yamaha 2100 sounds more powerful in practice—more “effortless.” That’s the best way I can describe the difference. 

My Parasound A21 sounds more powerful on the whole than either aforementioned amp, but it still doesn’t seem to plumb the lowest octave quite as deeply as the Yamaha. But among the dozens of amps I’ve owned, the Yamaha digs the deepest for some reason. That’s not to say the Coda is a slouch in that regard, it is certainly better than the majority of Class D amps, without question. 
 

@helomech Coda CSib appeared to have less bass than my Pass monoblocks initially in my system. As I spent more time with it, I realized the bass Coda produces is accurate, fast and tuneful. There’s plenty of it too. It will not shake walls which usually comes at the expense of quality of the bass and you end up with a one note huge bass output that lacks definition, texture and speed. Highly dependent on speakers, associated equipment and personal preferences though…