Class D at low volume


Hi,

How do class D amps behave at low volume levels?  My question is general rather than related to a particular amp.  I know there are exceptions, but as a rule, SET’s and class A SS excel at low volume.  What about class D?  Is low volume performance of class D predetermined, all else being equal? Do class D amps have a comfort zone?  Do they distort more at low volume or is it uniform throughout?  For the purpose of this question I am only referring to analog input amps and not the ones that take in PCM (e.g. NAD M2).

The second part of my question is as follows.  I’m interested in some higher end commercial class D amps from the likes of lab.gruppen, powersoft, mc2, XTA, etc. due to their network-ability as in, I can control them, DSP them, and stream digital, all via RJ45, at the same time dispensing with all the extra boxes and cables.  But, they are all of very high power from 100‘s to 1000‘s of watts.  Does this mean that in a domestic setting at low volume they operate much closer to their noise floor or is this different with class D?

Thanks
serge_s
Tim very well spoken , at low volumes is like having a loudness control , as they seem to fit in any situation there called for , i have very expensive monoblocks in the SET WYETECH LAB RUBIES ZERO FEEDBACK , 36 RMS , AND NOW PICKED UP A PAIR OF WYRED FOR SOUND 1000 WATT MONOBLOCKS , AND THE BASS AND DETAIL ON THE CLASS D AMPS GIVES THE SET AMPS OR PUSH PULL AMPS A HUGE RUN FOR THE MONEY , I WISH IT WERENT SO , BUT HEARING IS BELIEVING
Listening to wyred for the last month , difference between wyred and wytech ruby mono blocks , wyred $2995 , ruby $25000 , can't pick out the differences they are that close ,doing A B tests for 3 weeks nothing stands out in either one , will keep trying
Efficiency done well is always a good thing for sound quality I would say, including at lower volumes. Class D amps are the modern way to introduce some efficiency into a system with out the size bulk and other idiosyncrasies that might go with full range high efficiency speakers


Schubert,

Bel Canto has been doing Class D for a number of years so there is significant variability there I would say with newer models capable of outperforming older in general.

The earlier generation Bel Canto Class Ds ref500k, ref1000, not later m models, were stock older generation Icepower modules in a nice box. Prices reflect that.

ref1000m and ref500m added custom power and input sections to improve performance and match better to tube pre-amps.

ref500m uses a newer gen Icepower than 1000m last I checked so there could be some sonic differences there as reported.

latest BEl Canto products probably use newer IcePower mocules and I would assume implement design enhancements learned over time as well. I would expect top notch performance and that is what I read.

So Bel Canto crossed the threshold of top notch performance out of their Class D amps a few years back already I would say based on my experience with the hard to fault ref1000m however I have no doubt the technology is relative new still (compared to the others) and continues to improve technically in regards to bandwidth, noise level controls, etc., to whatever extent it may matter practically. The sky is the limit with this technology over time I believe and may already have crossed the threshold needed for top notch performance in "high end" systems practically. All signs seem to point to that.

I'm considering going to a compact integrated amp on my second system and the BC Class D based integrateds are on my shortlist there currently along with Wyred and Rogue. I am pretty sure I will go Class D only for an integrated as well at this point. It does not make sense to me to do otherwise at this point. Tube amps and monster sized Class A/B amps are becoming increasingly unnecessary to me as a result of the performance and value proposition with Class D.

Although you live in Minnesota right? You might want to go with an amp that wastes power and throws off some heat especially in winter. Kill two birds with one stone. I'm only half joking. Portable heaters are not expensive though I suppose.
Thanks for all the Info map, I'm bone tried of tube amps with their endless problems.