Comments please on: NAD M23 vs c298 vs. other newer Class D


I'm interested in comments about the new-ish NAD M23 amp. It gets rave reviews on the Absolute Sound channel, by Doug Schneider and by the review at Sound Stage, and by others. Reviews describe not only an even response across frequencies, but layering of the soundstage (left-right and front-back) as well as excellent measurements. Some describe the sound as somewhat tube like in the mids and upper range, others as neutral, but all agree it does not have the harshness which typically characterized reports about earlier amps with this design.

I am not giving up my Pass XA 25, nor my QS Mono 60 tube amps. Or my ST-35 Dynaco. What I'm interested in is a another amp in the stable that can play nicely among different speakers (not all are as sensitive as my main 97db ones), and that might bring that snappy dynamic speed to the sound but without making me cringe from the highs.

If you have some opinion of this Eigentakt design, especially in comparisons to Atma-sphere's Class D or other amps with similar technologies inside, please comment. (PS Audio, Bel Canto, et al.)

If you have some opinion of the NAD M23 vs. the cheaper-but-still-Eigentakt NAD c298, I'm interested in that, too.

I'm NOT interested in super pricey amps. Say, above $8k

hilde45

@hilde45 Three other class Ds to consider in your context: AGD, Orchard Audio and our class D. All have smooth sound more like tubes than solid state. 

@hilde45 

Not sure if this willl help. I used to own the NAD M22 (and M12). I had also tried PS Audio Stellar S300 amps (along with their matching preamp/DAC). I then “upgraded” to the M33 in that same system. Those were precursors to my current cabin system. At the time, the electronics were driving Sonus Faber Olympica Nova IIIs. While it sounded ok, I wasn’t really satisfied with it. I ended upgrading the electronics a lot - not a fair comparison to put a T+A SD 3100 HV DAC and P 3000 HV preamp in there. But before I did all that, I put the Atma-Sphere Class D monos in. 

Frankly - there’s no comparison whatsoever between the AS Class D monos and the NAD M33,  M22 and PS Audio S300 (eigentakt, modified hypex and ICE respectively). While the Class D monos need a lot of time to run in (>400 hours), I’ve found they’re quite remarkable in their performance. A reviewer even compared them favorably to his LAMM amps. I’m now using them to drive Sonus Faber Il Cremonese speakers fronted by the T+A DAC and preamp. Though they are the least expensive component in that system by a large margin, It find the amps to be fully up to the task. Smooth, stable, detailed and resolving and not lean or bleached iin the least which was my objection to the Hypex and ICE variants.

Hope this helps.  

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@kirkwallace  Thanks for posting your experience! And for the link.

@rocray  Appreciate it. Too many conversations are of the sort "either-or" and I'm interested in "both-and" if the "and" is a component that, like a new coffee variety or nice jacket, add to the expressive options available. Swapping an amp in and out are super easy for me, because my equipment rack is easy to access and has multiple components on it at all times.

@atmasphere  Thank you, Ralph. Appreciate it. Since you jumped on, a couple of questions for you:
First, how were you able to make a Class D module that competes with companies like NAD, Purifi, et al.? It seems like the kind of thing that teams of engineers and iterations of product development would require and you did it alone? That's astounding.

Second, will there be another iteration of your class D amps? The ones you have now are the first generation, while other amps in this class seem to have gone through a number of "evolutions." Is there a new Atmasphere Class D amp version in the works?

@mgrif104  Are you saying "Audio Stellar S300 amps" are the "AS" which won out? Or does "AS" mean "Atma-Sphere"? I assume the latter. 

And when you say, "Smooth, stable, detailed and resolving and not lean or bleached iin the least which was my objection to the Hypex and ICE variants." -- you're saying all the others had those defects? 

Just want to be clear about what you're saying. Thank you.

@mihorn  thanks for the contribution and the links!