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
Very interesting debate. For the most part conducted in a thoughtful and considered manner (not withstanding the usual sarcasm from he who must not be named). We can attempt to guess the future but that is a fools game best played by fools. Digital amps are here to stay and the technology will only improve. The fact is they are gaining market share and they are converting many audiophiles into believers.

I have spend many hours listening to Bel Canto amps (the new Evo 1000's) and they are in a word MUSICAL I also have many hours on the older EVO 2's which were (if you believe reviewers) a class A rated product. Debating these amps subjectively (against tube amps), while somewhat useful, is like debating how many angels can dance on the head of a pin.

From a design point of view the Bel Canto line is a home run and the modular look and concept appeals greatly to young professionals ---and is wife friendly. Who knows, it may even save a few marriages as tubeaholics partake in a mass conversion.

In a hobby populated with insane pricing and cables that possess magical propertties I for one like what I am hearing. In case you think I am a Bel Canto spokesperson or salesperson ---I am not. However I will give credit when it is deserved. Seven years ago Bel Canto was primarily a vendor of tube equipment. Before you could say "Class D"
they had, quite literally "switched". Pretty gutsy don't you think? Yeah, I can hear "he who must not be named" frothing at his bit "they compromised to follow the money trail". Probably. And I hope so...

Lest you think I am a nerdy computer geek who who dislikes tubes or audiophiles then think again. I am a 52 year old vinyl junkie and confirmed tube man (Wyetech Pearl pre and Wyetech monoblocks}. I love tube rolling and am a great fan of Ralph's OTL amps; as many of my friends own them. Yes I have paid the power company mucho dollars to run my equipment and participated in many sweat soaked listening sessions during the hottest days of summer. Yes I have diligently sought out NOS tubes and paid dearly for the honor.

I knew change was afoot when my friend called me up and said the furnace repair man took one look at his rather elaborate tube amps and asked what the hell are those things --- a freakin bomb!!!!!

Like the magazine says-----enjoy the music and show a little respect. And don't believe everyyhing you read particularly in a stereo magazine.

Cheers
Sure they can sound good,but why oh why did they all get such a terrible low score?Not even in the 40's ,50's,what 8,10.13?Mid fi at best
I'm quite happy with my class d amps. Yes the manufacturer offers upgrades at a not so out of site price. Yes i have upgraded twice, Yes each time my amps have increased in there ability to make music better. And yes i use a tubed preamp for now with my class d amps. A bit of the old with the new. For the life of me i cant understand why some have to believe that what they like is the only thing thats any good. Guys and gals if you have a amp and system thats to your liking i am so glad for you. Dont argue that its better than mine.
Enjoy your system and i will enjoy mine.
Mid-Fi huh. . . Oh Dear. . . I really did not realize the horrible implication of those scores! And I have been all along singin' the virtues of mere mid-fi trailer-trash electronics. . . how could I? What are my neighbors going to say if they only find out what questionable company I have been keepin'?! . . . I's so sorry I's so sorry. . . I really didn't know nothin' none of it!
Coffeey: "Sure they can sound good,but why oh why did they all get such a terrible low score?Not even in the 40's ,50's,what 8,10.13?Mid fi at best"

I think "4" might be better. Then the Accuphase A-50V should have a "3" and the Mark Levinson 333 a "2" :)

Chris