🚀 go-pugleaf

"Howard Ferstler" <ferstle@attglobal.net> wrote in message 
news:42DEEDA5.4B56E56@attglobal.net...
> Stewart Pinkerton wrote:
>>
>> On 19 Jul 2005 09:49:34 -0700, "ScottW" <ScottW48@hotmail.com> wrote:
>>
>> >
>> >
>> >Stewart Pinkerton wrote:
>> >> On Mon, 18 Jul 2005 17:00:48 -0400, Howard Ferstler
>> >> <ferstle@attglobal.net> wrote:
>> >>
>> >> >Trevor Wilson wrote:
>> >>
>> >> >> You STILL deny that I was correct, in spite of the fact that NOT
>> >> >> ONE SINGLE poster has supported your nonsensical stance. Not Arny, 
>> >> >> not Dick
>> >> >> Pierce, no one. You're out on a limb and completely out of your 
>> >> >> gourd.
>> >> >
>> >> >It is likely that I misunderstood the individual's problem.
>> >> >However, I still hold that a near short in parallel with a
>> >> >speaker will render that speaker mute, no matter what the
>> >> >protection circuits are doing.
>> >>
>> >> Well, you're just plain wrong.
>> >
>> >Define near short and define mute.
>> >
>> >It will probably put most amps into current limit.
>>
>> But not all................. :-)
>>
>> >> >In any case, a super-expensive amp (like that Krell) is an
>> >> >overpriced item that appeals to suckers.
>> >
>> > A Krell KSA will blow that short like a fuse :)  Instant repair.
>>
>> Quite so! :-)
>>
>> Even if the near short is current-capable, the Krell will still
>> provide enough current to drive both the short and the speaker. Since
>> they're in parallel, there won't be any reduction of voltage (and
>> hence volume) to the speaker. Shame that Howard doesn't understand
>> this.
>
> How can any current be flowing through the speaker? All of
> it will be passing through the short in parallel.
>
> Howard Ferstler

The only way the current through the speaker is zero is
if the voltage across the speaker is zero or the speaker
is fried and has infinite impedance.
We'll assume the speaker is ok.
Since the speaker and the short are in parallel..
they will both have the same voltage across them.

Clearly the current required to generate a voltage
across a true zero ohm short is infinite  (I = V/R)... but a true
zero ohm short is physically impossible (well maybe the
superconductor guys have something close).

So... if the amp hasn't shut down and is producing a voltage
at all across the short (which isn't really a perfect short)
... the same voltage will be present
across the speaker and current will flow thru the speaker.

ScottW