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[John Roberts {JR}]

Ted Olausson wrote on Mon, 18 February 2008 19:20

What does inputcap have to do with oscilliation!? it is a inputbuffer after the cap... -If so, it would oscilliate when there wasnt any connector in the amp....

Agreed.. an input rise time filter's only function is to harmlessly roll off out of band signals before they can cause the amplifier to slew limit and perhaps cause audible in band artifacts.

JR

[John Roberts {JR}]

SteveKirby wrote on Mon, 18 February 2008 19:40

Are you thinking of Spectral?  I think they were based in SF and founded on the premise that bandlimiting to 20kHz created slew limiting bluring time base information that provided directional cues. There was an arm of the company that made records,  Reference Recordings.  I have one record of theirs with Stephen Gordon playing Chopin.  Lots of ambience that sounds like the rear third of the hall.

Sorry for the senior moment.. No not Spectral either.. I think it may have been a Canadian company with a distinctive but somewhat oddball name. I can just about form a mental picture of the guy (short, dark hair). I think he made a splash at one NYC AES show. But like I said it was a big deal one year and gone in like 2 years or less.

JR

[Andy Peters]

Ted Olausson wrote on Mon, 18 February 2008 18:20

Andy Peters wrote on Tue, 19 February 2008 02:14 OK, smart guy, why not try it -- remove the filter and see how long the amp lasts before ultrasonic oscillation destroys the output stage. What does inputcap have to do with oscilliation!? it is a inputbuffer after the cap... -If so, it would oscilliate when there wasnt any connector in the amp....

Ummm, whooops. I have to apologize!

I missed the part about input filter.

-a

[Mike {AB} Butler]

Tim McCulloch wrote on Mon, 18 February 2008 18:47

Mac Kerr wrote on Mon, 18 February 2008 17:43 Tim McCulloch wrote on Mon, 18 February 2008 18:42 Can we stick a fork in this thread?  It's done.... Tim Mc It was done on day one. Mac Hmmmm... Let's carve it up and serve it...  lots of tofu; most of the real meat went unnoticed. Tim Mc

... Making it a Tofurkey!!  
Yes, we should lock this one, now.. It wasn't really worth it in the first place..