Best Digital Amp for Legacy Focus 20/20?

Ar t, Sorry if I am being stupid here, but what amps do you make/sell?

A_rt, how about you telling us what it is B&O says about their module 500A HF aberrations. I can't find anything.

Are you talking about their Performance Characteristics graph illustration at 4, 8, 16, and open ohms? Can't be, there's nothing there.

B&O's ASP module's digital supply produces some noise. This can be clearly heard, when comparing well made amps using the two modules. B&O's graphs do bare that out.

I think we are looking at the same graph. In some of mine, they are in color, in others it is multi-color.

So.....assuming that we are......look closely at the area between 10 kHz and 20 kHz. You will some slight variations.

At first, you may not think that little change is audible. I can assure you that is. Very audible. Which is why you need to listen to one on the system you intend to purchase one for.

Look......all amps will interact to some extent with the speaker. These amps just happen to have a particular type of interaction that will be much more audible to the average listener.

At some other time, I can relate a story about RIAA networks, and how very noticable a difference of 0.25 dB is. If not, let me say that most RIAA networks have a hump of around that much from 250-500 Hz. Very hard to take out. Very few products take it out. (Some leave it in on purpose..........)

You can verify this by listening to CDs and LPs that you have in both formats. Some will prefer the warmer sound of vinyl, and others the "accuracy" of CD. Not the point which is better. Just to demonstrate how little of a frequency change can make very large changes in perceived sonics.

Anyone wanting info on stuff that I make, or have made, is welcome to send me an e-mail or PM. I would rather discuss items of technical nature that interest me, than bang the drum for our products. OK?

(There is more than one thread that deals with not being able to identify myself and my company without screaming "www.buy.my.amps.com".)

Art, my highs are pristine. If you look at that graph dcarefully, you would see the dead short has the widest divergence from the other three. The 16 ohm line has maybe a 1/8 dB divergence, while the 4 and 8 ohm lines remain tied beyond 20dB.

The 500A is clearly superior to the 500ASP. The ASP graph have the four lines diverging between 10 and 15 kHz. Yet, you say whether one or the other sound better is a matter of opinion.

How about sending me one of your amps. I will arrange a group of honest people to give it a good listen.

Muralman1, your enthusiasm sometimes compromises your opinion. Your replicating the same notions you had for the EAR gear. I don't think Ar_t is claiming any superiority between his products and anyone elese, just that some building blocks seem to share some commonalities. I don't think your opinons are wrong they sometimes just come off as a bit directed(?). Your offer for comparison would be of much interest to all of us. Just let it be understood that as Ar_t has tried to clairfy that the results(as is usual, and according to Ar_t maybe more so than usual, but, the jury may still be out on that) maybe system dependent. Ar_t like Roy of Green Mountain offer unique perspectives that I think we should encourage. I'm sure the members are taking the appropriate amount of sodium intake, not that medicinal dosages appear to be necessary.