Re: [ARSCLIST] Compression (was Re: [ARSCLIST] A fundamental Flaw ...)

[George Brock-Nannestad <pattac@xxxxxxxx>]

From: Patent Tactics, George Brock-Nannestad

In the good old days, a nifty volume expansion could be obtained by placing a
low-voltage bulb of suitable voltage and wattage (indicative of both its hot
and cold resistance) in parallel across the speaker terminals (or the
amplifier). On high level, the voltage was high, the lamp lit, its resistance
soared, and there was more power to the speaker. Also, there was a nice time
constant to its functioning. Alas, using LED's just does not seem to work the
same!

Kind regards,


George

> I recently had to deal with this issue, which is basically one of changing the
> line impedence.
>
> Tweeters were blowing.  I  put a fuse line between the crossover and the
> tweeter, wire of the same gauge as the previous one, and heard only a slight
> difference, not significant.
>
> Steve Smolian
>
>
>
> ----- Original Message -----
> From: "Richard L. Hess" ArcLists@xxxxxxxxxxxxxxx>
> To: <ARSCLIST@xxxxxxxxxxxx>
> Sent: Monday, January 24, 2005 4:07 PM
> Subject: Re: [ARSCLIST] Compression (was Re: [ARSCLIST] A fundamental Flaw
> ...)
>
>
> > Actually, fusing can colour the sound slightly. The fuse is more than just a
> > conductor. Since it is designed to melt at it's maximum rating, and on loud
> > passages, that maximum rating is theoretically approached, the temperature
> > of the fuse element will vary (taking into account its thermal lag) with the
> > envelope of the signal.
> >
> > Since the resistance of most metals goes up as they are heated, this
> > becomes a variable resistor that is program dependent in series with the
> > speaker. To some small extent, this would compress the signal coming out of
> > the speaker. As the signal got louder (overall) the temperature and
> > resistance of the fuse would go up and looking at the fuse and the speaker
> > as a voltage divider, the percentage of the signal at the speaker terminals
> > would go down.
> >
> > Now this may not be a significant effect, but there is reason to believe
> > that there is some effect. I think this effect would be far more measurable
> > than some of the other items touted by purist cable companies, for example.
> >
> > Cheers,
> >
> > Richard
> >
> > At 03:54 PM 1/24/2005 -0500, you wrote:
> >>----- Original Message -----
> >>From: "Dale Francis" <dallen@xxxxxxxxxxx>
> >> > and then I as a "purist" would question how the fusing changes the
> >> > color of the sound !
> >>Since a fuse is only a section of a conductor which will carry only
> >>the stated amount of current before melting, any effect should not
> >>only be minimal...it would be less than the inductance created by
> >>not running speaker cables in an absolutely straight line from the
> >>amplifier output to the speaker locations!
> >>
> >>Steven C. Barr
> >
> > Richard L. Hess                           email: richard@xxxxxxxxxxxxxxx
> > Vignettes Media                           web:
> > http://www.richardhess.com/tape/ Aurora, Ontario, Canada             (905)
> > 713 6733     1-877-TAPE-FIX
> >
> >
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>
>
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