"While it uses the same complement of ES9028PRO DAC chips as the flagship HGC and retains the USB port, the B offers a fixed output level and omits the headphone amplifier, balanced and unbalanced analog inputs, volume, mute, and polarity controls, and the remote control." "The product under review is a stripped-down version of the DAC3 HGC." Maybe Hegel is a good match with Harbeth speakers.DAC3 B - Receives Stereophile's Highest " Class A+" Rating As posted above, Harbeth uses Hegel in their demos. They wouldn't have to be top of the line, but it would, at least, give you an idea how an amplifier behaves with radically different speaker designs. Say, B&W, Elac, Klipsch, Magnepan, Tekton, etc. I would think that, to do a proper review, you would use a variety of loudspeakers. Or an easy-as-pie to drive horn loaded design. An amplifier is probably going to behave very differently when driving a big, multi-driver speaker versus a simple two-way. You have a relatively high voltage and/or high current device trying to drive a reactive electrical load while trying to either maintain low distortion, or at least keep a certain type of distortion. Of all the components where matching would matter the most, I would think the amplifier-loudspeaker combination would have, by far, the greatest impact. Then, on the other, they review an amplifier with a grand total of two, maybe three, loudspeakers. One of the things I don't understand about high-end reviews is how, on the one hand, they talk about how important system synergy and matching components properly is. If nothing else it shows us there may.may, be a trend in more honest review results based on what is heard, rather than where the funding is coming from. Now I am wondering about the reviewer because 7/10 is certainly NOT acutely annoying.tiresome maybe, but not acutely annoying. Then I find the rating is 7/10.seven out of ten. To me this means the amp is not very good.I mean who wants to be acutely annoyed? The literal words, "quickly grows tiresome, and then acutely annoying after an hour or so." are pretty descriptive. Then I read through the review you provided and I am again feeling a bit mixed. We all know reviews have become dubious because our direct experience does not reflect that of the reviews in many instances. I do find the idea of an honest negative review interesting. When I saw this thread with your name attached I thought it will be worth checking out. Hey avanti1960, I consider you a good opinion on this fourm. These are similar to my own impressions of the amp when I heard it ~ 3 years ago. Many more examples of this conclusion were noted during the audition, but the sound of the H20 was consistent on all sources." Overall Rating: 7 LPs However, the coarse push-pull character of the H20 quickly grows tiresome, and then acutely annoying after an hour or so. Listening to the Benchmark amp for hours on end is a pleasant and pleasurable experience. The Benchmark AHB2 amplifier presents Bonnie’s vocals on “Sweet Forgiveness” with far greater openness and continuity, and with a reach-out-and-touch sensation that is largely absent with the Hegel amp. From the Hegel Website: “The Hegel SoundEngine technology is not using any kind of global negative feedback, it is using local and adaptive feedforward technology if there should ever be any need for cancellation of distortion within the audio amplifier stages.” Please. Hegel’s implementation of this error correction is called “SoundEngine”. Feed-forward error correction seeks to fix problems before they begin. One problem with this is that each time errors are corrected, more errors are created in the feedback loop. Briefly, negative feedback – which many amplifiers employ - seeks to correct amplification errors after they have occurred. "The Hegel H20 stereo power amplifier was of interest because of its use of “feed forward” error correction. In a review for the Hegel H20 power amplifier I could not believe what I was reading.
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