A great article on Class D/switching amps


The latest edition of The Absolute Sound has, in my opinion, the best overall perspective and evaluation of the eight most regarded class D switching amps on the market today.

The article contains an explanation of the technology, an interview with a couple of the most important designers, the individual reviews and finally a round table discussion regarding these amps.

I believe any of you GON members who might be considering auditioning a class D switching amp would want to review this piece regarding their different sonic signatures.

I had the pleasure of listening to the Kharma MP150 which the panel picked as being on top of the "heap" compared to Audio Research 300.2,Channel Island Audio D-200, Nuforce Reference 9 Special Edition, Red Dragon Audio Leviathan Signature, Jeff Roland Design Group 201, Cary Audio Design A 306,and finally the Spectron Musician III.

Each amp had at least two different reviewers with different systems evaluate them and then compare their experiences. This was a well done piece and if you read it I believe you find it both educational and helpful to understand what these amps are all about.
teajay
That's right, Tvad. The Sig 30 provides a very convincing argument for switching to high efficiency speakers. I've seen numerous testimonials now saying it may be the best SS amp available. And at $1400 for a single input integrated, it has to be the best overall value on the amplifier market.
Consider Reference 3a or Zu Druid as good speaker choices.
I got a chance to read the article and thought it was pretty well written. I wish I could have had the chance to hear all the amps in the article. I own a pair of Nuforce monos and like the price to performance. They do many things very well and for the money it is an easy choice to live with....until I go listen to my good friends VAC tube amp & Messenger preamp. The technology is interesting and hope it keeps evolving to bring exciting sound into more budgets. The gear that the class D amps are compared to in the TAS article is kind of ridiculous in my eyes. Why didn't they make more comparisons to some comparably priced solid state & tube amplifiers? I think what Robert Harley says about auditioning in your own system is spot on. I wish more manufacturers made this possible and somewhat practical without having to lose your shirt by buying new and selling used, or pay a 10 or 15% restocking fee.

I agree with Tvad about the Red Wine Audio Signature 30 amplifier that is battery powered being interesting. I am even more intrigued about Red Wine Audio's new Signature 70 monoblocks that are coming out next month. They are on my very short list.
I read the article in the latest Absolute Sound and it would appear that the Class D technology is still evolving. Interesting that the reviewers either seemed to love them or hate them; one reviewer in particular seemed to characterize the class D amps as cold and sterile and didn't like the majority of the amps reviewed. For a new design there seem to be several of these class D amps on the used market already which goes to show that they are not everyone's cup of tea.
Again I cannot imagine that Class D or ICE amps all sound alike. I have not had the opportunity to listen to them side-by-side, but only one, the Red Dragon, caused me to go back repeatedly to listen to it on the Audio Zen speakers.