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The noise is already so slight that I can't help but wonder how any real improvement will be audible.
Imo, the Ncore amps undoubtedly produce layers of noise that interfere with musical enjoyment.
I'm also interested in what data sheets do not say and what current knowledge does not know. Fwiw I recall Bruno using pretty much the same language to describe the quality of both his UcD and Ncore lines.But back to the data sheets. They show distortion, yes?
Freo, I'm saying the Ncore distorts. Ergo, it can be improved.Cab, low is not zero. One reason for the Ncore's non-zero distortion rating, I'm sure, is the amp uses electrolytics in its power supply. Electrolytics generate considerable non-linear distortion. Some of that distortion is finding its way to the output---necessarily, according to basic electronics theory.Bruno has said that THD plots do not reveal power supply anomalies of the types I'm naming here. Measurements are helpful. They just don't say everything. Classical physics of, say, year 1800 could not measure what it didn't know to exist, like quantum phenomena. Does that analogy make sense? Progress always moves into what was previously unknown. If something is unknown, by definition it cannot be measured---even assuming measuring capability for such.
But new tube amps in the $80-100K were introduced at the Munich show in Germany last month. It seems that Japan failed.
Btw, I do plan to build a bridge Ncore amplifier. I will drive each bridge with a single Hypex smps. I'll report back after I receive the modules to say whether bridging does in fact work as I think it should. I'm putting my money where my intuition is.Freo, I'm unsure how to compare distortion spectra of two amps. I don't doubt the Ncores are good amps (see above). My sense is the Ncores are very good, but I'm expecting they'll suffer somewhat from NFB dullness. I say "somewhat," here, because ideally I want a zero-distortion amp, which NFB helps attain, but my experience with NFB is it diminishes something subtly vital in music reproduction. But the Ncore is a digital amp (refutations noted), which seems to me to open new possibilities for using NFB in ways that augment more than diminish. And it seems to me the high switching frequency (500KHz thereabouts) should ameliorate some of the HF strangeness of class D, of which I'm very familiar (I own a Tact, which drives my ears wild after long listening sessions and which I attribute to VHF nastiness).In audio, because the very parts we use to build amplifiers are solely responsible for distorting the signal, we're left with the choice of designing very simple amplifiers (like SETs and SS varieties like L'Amp, which I'm also building), or of using those distortion-creating components in a complexity that is finely adjusted to self-defeat that distortion. Bruno's new design looks to me to employ complexity in rather innovative ways. I'm impressed with what he has accomplished and look forward to hearing these critters. Bridged, of course.
Freo, I'm saying the Ncore distorts. Ergo, it can be improved.Cab, low is not zero.
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