Should I steer clear of class D amps

I have owned the Nuforce Reference 9 SE mono amps for about 6 years.  Bob Smith did the TDSS level 3 upgrades to them about  5 years ago and he then did the latest CapCellBar upgrades to them about 3 years ago.  The level 3 upgrades were very significant, but the CCB upgrades were phenomenal on top of the level 3.  I added the SR Purple fuses to them about 1 year ago.  They had the SR Black, then SR Orange prior to that.  All were easily noticeable and much better sounding in all areas than their prior sound.  These are class D amps from about 2008 or so originally.  The upgrades have made them superior to every amp I've heard them against in most all areas and with several different speakers.  I use them with VMPS RM40 BCSE w/MLS cabinets and all the upgrades except the OXO.  

Bob

@nosleeptilldownload

Don’t Audio advisor and Crutchfield sell NAD?

If so, you can get one with a trial period and refund option.

Listen for yourself in your room and decide !

Based on the OP musical taste and high sensitivity a class D may just be the ticket ....

Regards ...

My understanding was class D never really took off, despite the power efficiency due to the HF noise caused by the PWM. Times change things improve but I can’t find much about how they have mitigated this, in fact an article in EETimes refers to how the tests performed for THD etc are quite irrelevant in a digital amp and quoted figures may be very different in real life. In essence, the way of testing makes them look better than they are. This may be true but do they sound good? We all know vinyl is technically an inferior medium but I certainly prefer it’s sound.

@nosleeptilldownload Your impression above is incorrect. Class D really took off and is used nearly everywhere.

What makes an amplifier musical or not is its distortion and nothing else! Literally the distortion signature of any amplifier is also its ’sonic signature’. The trick to getting an amplifier to sound musical (for example many tube amplifiers) is to have a benign distortion signature which the ear does not find irritating.

Since this is all about understanding that fact and also engineering, its possible to build an amp that will sound like music if you have the expertise.

Cutting to the bottom line there are class D amps out there that sound every bit as musical as the best class A tube or solid state amps. Because you’ve not heard an example of that yet does not mean they do not exist! IME class D amps vary as much in sound as tube amps do- from the worst to the very best.

I’ve been playing a set of class D amps in my own system the last 2 years and do not miss the class A triode tube amps they replaced at all.

I have a Boxem Arthur 4215 which uses Purifi Eigentakt modules. I picked it since my KEF LS50 Metas need a bit of power. It is a really great balance that provides more than enough power at 4ohms, clean, with a neutral balance. In other words the amp is not really heard in the system at all as my room tuning is really the key.