From: John Woodgate
Subject: Re: 'Current Dumping' Amplifier Circuits ?
Date: Wed, 4 Dec 2002 06:51:53 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Wed, 4 Dec 2002 10:48:33 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Phil Allison
wrote (in ) about ''Current
Dumping' Amplifier Circuits ?', on Wed, 4 Dec 2002:
> ** I am not with you here, John.
> The average power delivered into the speaker over some period of
>time is what may overheat it - the THD of the amp is just not involved.
>This average may be enhanced by amplitude compression as a result of
It is my experience that if you can actually get 150 W from your '100 W'
amplifier, sooner or later that will be obtained for long enough to zap
Of course, fully-squared off output gives you 200 W, even if the onset
of clipping really is 100 W.
> PA amps have had low to very low THD figures ever since they stopped
Well, the big US brands, yes, for PR reasons, but there are many other
smaller brands that just have sufficient linearity, no more. And some of
those early low THD figure were accompanied by non-negligible slewing-
induced distortion ('TIM').
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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