1. Home
  2. amps-preamps
  3. 1192052948

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.
elberoth2
tvad
9,467 posts
 
People steeped in the land of valves are so righteous...

From my observation, that's not limited to proponents of valve amplification.

If one would take a step away from the politics, I believe one could appreciate Atmasphere's point.

None of us can determine if our systems are accurate without having heard the recording session in progress and then compared it to the playback of the same recording on our systems. The likelihood of that occurring is remote and limited to a fortunate handful of audiophiles.

Certainly, there are many, many systems that recreate the illusion of a live performance...whether it's a tube, solid state or chip amp system.
muralman1
1,527 posts
 
Tvad, you are walking right into that bravado I just tried to debunk. Any master tape is going to be more accurate to the performance than that which is tortured through processing. There are great recordings and a lot more bad.

Saying that only the chosen few who follow the recording from the performance can ascertain their system is the closest thing is crazy in my view.

I have sat just a few feet away from guitar maestro Leo Kottke. Do you really think I should have recorded that incident to have any recollection of what it sounded like?

My daughter stood just as close as she practiced her very fine viola daily. It is live, why would I need to record that?

tvad
9,467 posts
 
Muralman1, if you had recorded your daughter's performance on a good multitrack reel to reel, and then played it back, you would have an excellent idea of your system's playback accuracy. I recall Von Schweikert did this exact experiment few years back at CES to demonstrate their top-of-the-line VR11 loudspeakers.

I believe this was Atmasphere's point, but perhaps I misinterpreted his comment.

BTW, my system is better than yours.

Nya-nya-nya-nya---na---na---

:)
muralman1
1,527 posts
 
You have not convinced me. Knowing what a family of acoustic instruments sound like in real life should be one's gauge, not the recording. Besides Atmasphere is no more likely to remember whether his playback sounds like the performance. He still has to rely on his memory.

When I clicked your system I found you use Bose! :)
guidocorona
4,114 posts
 
OK gang, now making a feeble attempt to get back on track. . . who has had any experience with the Halcro MC20 or other Halcro class D designs?
More to discover