On Wed, 30 Apr 2008 20:02:26 -0700 (PDT), jrv331@[EMAIL PROTECTED]
wrote:
>I purchased a monster cable SS-6 speaker selector and according to the
>manual it has " High Current Amplifier Protection circuitry: When
>engaged, this impedance matched circuitry maximizes high power
>amplifier performance and allows you to safely use multiple speaker
>pairs simultaneously without overloading or damaging your amplifier."
>
>My question is why would you ever turn this off? Is there any harm
>leaving it always enabled?
Several opinions have been offered here already, but my recommendation
is to check before committing. The better speaker switching widgits
use a series resistor of about two or two and a half Ohms in series
with each amplifier hot lead, and all speaker pairs switched in
parallel.
"Protection Engaged" in this case means shorting across (or not)
the resistors.
None of the "better" (there really isn't any such critter as an
"ideal" here) four or six pair switchers do any series connections.
For larger installations an autoformer pair like the Niles SMS-10
is commonly used, along with local autoformer level controls.
And to answer your "why" question, the series resistor causes a
small drop in level, some change in frequency response, and a
(very) small interaction in (local/downstream) volume control levels.
This is all balanced against the danger to the amplifier...
All the best fortune,
Chris Hornbeck
"It's for compatibility with 8-Track."
-scott
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