I looks like my bathroom scale.
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Being frank, the comment that "apparently it has patented a new hybrid of Class A and Class D technology" may be true, but it immediately reminded me of the claims of the DK Design integrated amplifier when it was released to rave reviews, and it had "Super Class A" or whatever they called it. Turned out the power claim was total nonsense.
Anyway, this new amp may be exactly what the manufacturer and reviewer claims, but it does look like a bathroom scale, and claims of latest and greatest in audio are as worn as an old Persian carpet.
Well the media can deal in hyperbole from time to time. The Hi-fi press have their faults though usually in the detail of the review you can filter out the true value of what the reviewer thought-often it is a case of positive spin-trying to put the product's positives in context but usually you get a feeling of its worth.
This was a review by a respected journalist who tends not to deal in hyperbole and he was stating it was an exceptional and exciting product.
I thought I'd share and I'm not surprised at the replies many of which missed the point-it was to make you in the States aware of a product that has only been reviewed in the UK. I wasn't stating it was true what was said in the review but as I say I thought this looked interesting for people interested in the hobby.
Imagine the term "best" being up for debate, wow. I think a reviewer can state in his own opinion probably having heard the best equipment available where it stands in the grand scheme of things.
Now what we all think when we hear it is what is key..... but nevermind it looks like a set of bathroom scales.
Two points it is not a Class D amp.The manufacturer claims it is a hybrid of Class A and Class D.
Therefore, it incorrect to state that it's not a Class D amp. Unless this hybrid is assigned a new classification, then is a Class D amp, as well a Class A amp.
As far as I know there is not a Class A/D.
03-12-10: Ben_campbellYes. If it's a hybrid of Class A and Class D then it uses both classes of amplification. So, it's both Class A and Class D until specifics are provided to demonstrate otherwise.
I'm not being argumentative. I'm making a point I consider valid. A company should be required to provide more details to support their claims if their new patented technology is to be accepted as legitimate. How about a patent number? Country of patent?
Diavlet calls their patented hybrid "ADH". Do a web search for "ADH amplification" and you will find nothing. Until proven otherwise, I believe this should be considered a marketing term and nothing more.
Again, it brings to mind DK Design's "Super Class A", which was strictly marketing.
Where is the photo showing the output and input jacks? Are they on the back? On the bottom? The website shows the unit wall mounted, but no wires. Pretty cool, but how does one connect all the wires? Through the wall? Is amplifier applicable to anything other than a custom designed installation?
Here is a link to their USA patent:
The HFNRR review can be downloaded as a pdf here:
Page 3 of the review has a box describing in very general terms how it operates. The patent includes considerable additional detail.
The patent describes the topology as being "Class AD." Since the great majority of the power to the load is supplied by the Class D section, I certainly don't think it would be correct to refer to it as being Class A in any sense other than the fact that the output voltage is controlled by a Class A circuit element (notwithstanding the fact that the Class A circuit element is connected directly to the output).
Perhaps all that can be said, IF Class AD is not a generally recognized term at this point (and I don't know whether it should be considered as such or not), is that it uses an output topology that encompasses both Class A and Class D circuit elements, that work in conjunction with one another.
See if people just read, you know take their time and read or take the effort to actually understand what this was supposed to be about then we'd all be better off.
I don't cynicism, I don't mind doubt but actually dealing with the review and the details on the website would be the basis for saying-I don't fancy this because of a, b or c.
Instead we got bathroom scales and a cheap Class D or was it Class A debate.
03-12-10: Ben_campbellAnd if you bothered to post the links initially, you know took the time or the effort to do the research to help us understand what you posted, then we'd have started of with a more productive discussion.
Big hug, Ben.
I think this reviewer should be shot- we have all heard this type of thing before and for anyone who has been in this hobby for a decade or more this is getting old!
However- I do feel like the technology here is interesting, at the moment. At the same time- digital changes too quickly and is too imbedded into this unit for it to be a sound investment. Ill buy this on ebay in 2018 for $900 and check it out when everyone else is listening to 32 bit or whatever material. This is not going to be like a Mac mc60 monoblock in 40 years. It will be worthless.
The other thing that I scratching my head over is how the reviewer listened to a DVD-A at 24/192 through a digital input. Did I miss something or did I read that wrong?
Now it wouldn't have been a wasteland-more a landscape of bathroom scales......................
As pointed out already the link didn't exist when I posted though to be frank I doubt that would have helped the standard of reply.
Let's see what others say when the amps reviewed maybe he reviewers will have more open minds eh?
the references to Blu-ray, DVD-Audio and 24 bit sources are all over the review. EVERY test track listed is a high resolution file. The reviewer summarizes this again in the "Verdict" box.
I have a feeling that the amount of time spent listening to high-resolution files "skewed" the review.
This review could easily be re-written as a rave review of the Linn DS high resolution source, because in a system context no one in his right mind can differentiate the source's and the amp's contribution to the overall sound quality.
In order to know for certain that the amp is REALLY that good, the reviewer should have auditioned alternative/benchmark sources and amps.
Ben_campbell, it sure has had no visibility in the US. Maybe it will be at CES or THE Show.
Casouza, I noticed that also and think there is some reason, it has so little visibility in the US. I have heard some rumbling that when compared with other amps with standard software, it proves unexceptional. I withhold judgment until I hear it.
It has a forward looking, unique design and is expensive.
It probably sounds very good also but I have not read anything yet that makes me believe it outperforms the competition on sound quality alone.
Also not sure about the value proposition.
It should appeal to those with the bucks that want something that performs well and is a little different.
I do not seeany details about the class A/D design and how that works, so I am suspicious, but I suspect it should appeal to Class A fans that are otherwise shy about anything with the word "digital" or "switching" in its design even if it turns out to be more about semantics than actual technical innovation.
Wait a few years and there will be more smaller gadgets to choose from with equally good sound and modern features for considerably less I will wager.
I think it is a true digital amp meaning that a digital rather than analog signal is processed internally by the amp section to then drive the speakers.
For that to happen, any analog signals input must first be converted to digital internally.
The combo of being a true digital amp with using a hybrid Class A and Class D amp section where the Class A apparently drives the high frequencies would seem to be a very innovative approach that I would like to hear. A sophisticated digital filtering and analog cross over circuit would be needed internally as well to pull this off I would think.