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Bob,
Did you ever master with McIntosh MI-200 amps?  Those were incredible amps.
Phillip

Bob Olhsson wrote:
> -----Original Message-----
> >From Steven C. Barr: "... As I understand it, the 44.1KHz sample frequency
> is supposed to produce an adequate version of the actual analog signal
> such that our human ears and mind can't hear any identifiable
> difference...?!
>
> On the other hand, there DOES exist an identifiable and demonstrable
> difference between vacuum-tube and solid-state audio equipment! Oddly
> enough, this difference exists because most audio amplifiers operate
> with audible/identifiable distortion. Tube amplification simply decreases
> in efficiency is limits are approached...producing a distorted signal
> waveform, but one without any "sharp corners"...! Solid-state amplification,
> OTOH, simply reaches its limit and quits amplifying any further...leading
> to "sharp corners" in the waveform..."
>
> I'd like to correct a couple common misunderstandings.
>
> First off, we got 44.1 because it was the highest sample rate that off the
> shelf video equipment could edit and off the shelf video disk technology
> could replicate. It was well known at the time that 44.1 would be a
> compromise in any real-world implementation. This was why 48kHz was chosen
> for professional applications and most theorists believed sample rate needed
> to be pushed as high as 60kHz. to actually eliminate all artifacts within
> the audible range.
>
> While tube equipment shows different distortion characteristics, the real
> reason people preferred it was that it had a significantly wider useable
> dynamic range as opposed to the "pleasing distortion" claimed by the
> salespeople. Solid state offered huge profit margins leading manufacturers
> to choose specs that made it look better but if you measured how the
> equipment was actually being used, the spread between audible noise and
> audible distortion of tube gear could be as much as 25 dB. better.
> Unfortunately the dynamic range of most contemporary tube gear is worse than
> most contemporary solid state gear and people are bragging about the
> pleasing "warm" distortion. Misleading advertising from 40 years ago is now
> passing for truth.
> 	
>
> Bob Olhsson Audio Mastery, Nashville TN
> Mastering, Audio for Picture, Mix Evaluation and Quality Control
> Over 40 years making people sound better than they ever imagined!
> 615.385.8051 http://www.hyperback.com
>
>