High end Class D amps?

I used a NAD M22v2 for a couple of years.  The NAD M22v2 build quality is superb. It's the only class D that I've ever owned.  The SQ was quite good and it drove my Tannoy DC8Ti 89db speakers with ease.

I replaced it with a BHK 250 and of course there's no comparison.  The BHK 250 is better in every way.  Being a hybrid amp at more than twice the price, I'd expect that and have not been disappointed.  I plan to keep the M22v2 and use it in a secondary system with a tube pre amp.

Some helpful insight here. Just starting to explore adding a sub to my system and wondering whether Class D is the way to go. The sub will run with an active crossover and is 94db efficient with a stable 8ohm load +\- 1db. I like the idea of a small mono block like the D Sonic but would appreciate opinions on whether Class D would be good in this application.

class d greatest strength is outstanding bass, so yes on that front

but dual subs are much better than one...  some will even say the best way is a 'swarm of subs' to smooth out the deep bass response, which can be very lumpy and hard to modulate with a single sub in many rooms

class d greatest strength is outstanding bass, so yes on that front

but dual subs are much better than one... some will even say the best way is a 'swarm of subs' to smooth out the deep bass response, which can be very lumpy and hard to modulate with a single sub in many rooms

I'm running a pair of Swarm subs with a class D amplifier, to break up the standing waves in my room. My main speakers go down to 20Hz so I didn't need 4 subs. Its amazing how well it works- the bass is absolutely consistent everywhere in the room now (a lot of bass was absent at the listening chair prior, with too much bass elsewhere in the room).

dodgealum Just starting to explore adding a sub to my system and wondering whether Class D is the way to go.

jjss49 class d greatest strength is outstanding bass, so yes on that front

Definitely the way to go, but there is a proviso, so long as the bass (sub) loading is "not too" much below 3-4ohms with high EPDR (-phase angle), "if not so" then Class-D’s high point is it’s bass and it’s claim to fame.

You’ll see that Class-D’s output impedance is measured in milliohms, not in 1/10’s of ohms like Linear amps. So for the same given subwoofer load a Class-D amp has a multitude better "damping factor" (woofer control) than a linear amp can do.

But saying that into a hard bass frequencies "loads" like a Wilson Alexia etc that have of 0.9ohms (EPDR), a linear amp like Gryphons etc etc will wipe the floor with the Class-D in the bass, because the Gryphon etc can do far more current into that 0.9ohm bass speaker load.

So you have a two edged sword for bass, "control" (damping factor) and (current drive), and it all comes down to what the load is that the sub is presenting to the amp, to which will sound the better for the bass, Class-D or Linear (Class-A,A/B)

Then you have to ask, which bass is the better designed, one that's an easy load or one that's a ***** to drive, I generally find the latter to give the better sounding bass when driven right, as they have usually been developed to the max, and the down side is a hard to drive impedance loading for an amp to see.

Cheers George