Honest Amp Reviews: Impossible?


So, I’ve noticed a flood of class D junk hitting the market over the last several years. They come from many different brand names from people you’ve never heard of before like "VTV", to popular Internet-in-the-know brands like PS Audio to famous names like Marantz. One thing they ALL have in common: the complete inability to find honest reviews online for these products.

For example, let’s take for instance the Stellar series from PS Audio. Class D junk with the usual attempt to improve euphonics with some kind of input stage. They call this scheme class AD, I guess to differentiate all the other brands that do something similar. However, you’ll never see a review site point this out; they’ll comment briefly on the design and then dutifully call it class AD afterwards as if it isn’t just a class D amp like many others.

Next, the reviewer will invariably lie about the sound. This lying usually takes the form of lying by omission. They’ll gush about how beefy and controlled it is, how neutral it is, how wide and natural the soundstage is, etc. What they WON’T mention is how lifeless, flat, boring and ultimately fatiguing they ALL are. The buyer who doesn’t know any better has to find that out for themselves while he slowly grows to distrust anything a reviewer has to say about anything. So, the only way to actually get value out of a review is to see if a certain amp has the positive attributes you are looking for while trying to painstakingly research any problems it might have because the reviewer won’t mention them.

In addition to the lies of omission, there’s the usual con of giving certain gear to certain reviewers who will appreciate / like the piece. That Stellar will NEVER be put up against a Dan D’agostino or a Pass for example. This could be valuable to the buyer to see how a lesser amp stacks up against a high end one, but it’s not, apparently, useful to the reviewers. Why? Why is telling the whole truth about amps -- all gear really -- taboo?
madavid0

Showing 1 response by timlub

@madavid0

You don’t seem to be fair in your assessment. You do a good job of tearing down class d, but you haven’t said how many that you’ve had in your home.
For me, I’ve owned a few Class A amps, a Ton of Class A/B and recently went on a DIY Binge with Class D. I have built 11 Class D amplifiers from modules. In every case, I have changed to larger caps on the rails to as much as I could fit and changed out or bypassed any caps on the input. On 1, I added post feedback circuitry on the output.
2 of these ended up being very satisfying, a bit toward the warm side, decent detail and 2 were very good by anyone’s standard. The others varied radically in sound quality. You might not consider this high end,  it only retailed at $15,000,  but I do have an Edge NL10.2 at home now.  
My Pre is an SST Ambrosia, I’ve been building speakers for 35 years, so the speakers are mine. These amps are no different than any in the sense that they will be someone’s favorite and others won’t care for them.