Re: Speaker Kill Switch

[MFHult@xxxxxxxxxxxxxxxxxxxxx]

On Tue, 27 Jun 2006 11:56:10 -0400, "Robert L Bass"
<robertlbass@xxxxxxxxxxx> wrote in message
<H-adnbCGXNC8yDzZnZ2dnUVZ_s6dnZ2d@xxxxxxxxxxx>:

>Bobby,
>
>That's old information.  Modern consumer amps are not adversely affected by
>operating with no load.  Some of the old stage amps would blow their finals
>if you disconnected the load while they were operating at high volumes but
>that won't likely be an issue for his residential gear.
>
>As to make-before-break, that's still important when you're swapping line
or
>mic level sources but not for speaker loads.  Since he's only interested in
>killing the sound to a speaker it's a complete non-issue.  In fact, several
>of the more popular makes (i.e., Russound, Niles Audio) of impedance
>matching volume controls are offered paired with an A/B speaker selector
>switch that does not make before break.  Some clients even use the A/B as
an
>On/Off switch so they can leave the volume at a given level when switching
>the room sound on or off.

Like Robert said ...

Also, one thing you do want to avoid is a _shorting_ on-off switch. Line
level input controls commonly used to short unused inputs to ground to
minimize cross talk. Don't inadvertently use one  of these to switch
_outputs_ or you may indeed blow a fuse or, worse yet, an amplifier channel.

Those old switches may have gone the way of tubes  .. Wait!  Tubes are in
again, right?  At least in the heartland, but back out once again on the
coasts. Or ... ;-)

... Marc
Marc_F_Hult
www.ECOntrol.org