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
Hey Atmasphere, reference sir? my Scintillas can bring all the thunder of four antiphonal organs complete with reverberations, off the walls of the Cathedral of Freidburg to life in my listening room.
hi ralph:

the recording was made in a den at a friend's house. the purpose of the recording was to make a comparison between the timbre of the cymbal and the timbre reproduced by a stereo system using the cymbal recording as the source.

i would hope the comparison is valid. the cymbal was not near any room boundaries.
Do the Halcro MC20 and Red Dragon Leviathan have the artifacts of most Class D amps? thanks,
Hi Lucey, I have no info on the sound or technology of the Halcro MC20 (is it a digital amp?). Red Dragon in my experience does not have stereotypical 'digital amp' artifacts, but to my ears it may be somewaht dark. I Also remember I was hoping to hear a little more of harmonic development and microdynamics when I listened to it last year at RMAF.
Hmmm, If I had only done my homework. . . I would have been able to answer my own question. MC20 from Halcro is a class D amp indeed. And here is its Stereophile review:
http://www.stereophile.com/solidpoweramps/406halcro/