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As promised on the General Asylum a couple of weeks ago, I have posted
my interview with the late John Ulrick to the Stereophile website. (See
link below.)
John Atkinson
Editor, Stereophile
Follow Ups:
Thanks for doing the interview
In the ensuing 27 years, class D amps have certainly made great strides.
Mr. Ulrick was one of those fortunate people who had the right skill set at the right time and place. Infinity in the early days must have been a very interesting place to work at.
Thanks! for sharing- JA.
RIP; not sure what role he played in the IRS; but it was certainly the thing of legends back in the early 80's and undoubtedly raised the bar in home audio speakers.
Mr. Atkinson, thanks very much for doing this.
C'mon John, just as the interview picked up , over ....
Edits: 06/10/15
I bought a Musician II from John in 2002 because he told me it would mate wonderfully with my VS 5 HSE's and boy was he right. I don't regret selling those speakers but sure miss that amp - made Albert's design really sing! I had a two hour conversation with John and my head was spinning after it was over - a brilliant designer and a gentleman!
"Now, another thing is that if you watch music on an oscilloscope, power is not what's important in an amplifier. What's important is how much voltage you can put into a speaker."
"The hardest thing of all is to find a black cat in a dark room, especially if there is no cat" - Confucius
"Now, another thing is that if you watch music on an oscilloscope, power is not what's important in an amplifier. What's important is how much voltage you can put into a speaker."
Uhh... Aside from voltage being linear and power being exponential, aren't the two items essentially the same thing?
"...aren't the two items essentially the same thing?"
Voltage / resistance = current
Current times voltage = watts
So yes, you are correct.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
"And [a PWM amplifier] with 160V rails can put 125-135V into a speaker on real high transients - the snap of a drum, for example. So [a switching amplifier] can put a pretty clean, very-high-power transient into a speaker without a lot of screwy things going on. "
As can tube amps running 550V rails into electrostats!
voltage drive without current is akin to sugar free ice cream....
Each VTL amp can draw 8A from the wall. :)
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