Class-D amps - a different re view


Martin Colloms, the editor of HiFi Critic (ad-free mag from the UK) have recently published the review of several different Class-D amps, together with an in depth technical analysys and measurments.

His conclusions were not favourable, to say at least:

"I regret that not a single model merits unqualified recommendation. Price is not the issue; the poor listening tests speak for themselves. (...)
At present we have to take the prudent view that good sound might be possible from switching amps, but we haven't heard it yet."

BelCanto REF1000 (ICEpower) - score 10.5 pooints
"The ICE power module used has a dependable reputation, and the design is well built and finished as a whole. While I would not suggest that you shouldn't try this amp, on sound quality grounds alone I cannot recommend it for audiophile use."

Channel Islands D100 (UcD) - score 13 pooints
"While I have reservations about a number of aspects of sound quality, and advise personal audition, given the solid lab results (...) the overall performance and the moderate price, these CA Audio monos do make it to the 'worth considering' cathegory."

NuForce 8.5V2 (proprietary technology) - score 9 pooints
"Yes, the price is good for the power output. Yes it's pretty, light, small and runs cool. However, the sound quality simply does not justify recommendation." (on top of that the NuForce amp measured very poorly - Elb)

Pro-Ject Amp Box (Flying Mole) - score 5 points
"I'm sorry to say that Project (...) was a real disappointment in the listening tests, and can't be recommended."

Just as a point of reference, recently reviewed Krell 700CX scored 100 points, CJ Premier 350 - 110 points and ARC Ref 110 - 135 points.

At least someone have had the balls to say it. This is why HiFi Critic is THE mag to subscribe.
128x128elberoth2
No soul.Sound hi-fi-ish.Have great catchy qualitys at 1st but lack musicality.
Companys trying to appeal to the smaller (looks) is better crowd.
And to the point. As I said my Nuforce 9SE V2's sound better then real music.Hyperrealistic if you will.
Uhmmm, go enjoy the music. My amps are great. The music is superb.
I'll drink to that, Zilla!

By the way, what amps have you compared before /after selecting your Nuforce? And what were relative strengths/weaknesses?
Muralman1, I've not checked out all the modules that are out there, and I was careful to comment to that effect.

FWIW though, distortion has nothing to do with what impedances an amplifier will drive. The two issues are unrelated. Neither is THD a good indicator of how an amplifier will sound. The current test and measurement paradigm does not generate specifications that are intended to let us know how an amplifier might perform sonically.