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Also, please note that the second set of speakers in room 3 will be
installed at a later date IF 1 pair isn't enough/doesn't sound good enough
in that room. Does that change anything?
Chris
"Robert L Bass" <robertbass1@xxxxxxxxxxx> wrote in message
news:AeidnUaMOL5_BgHYnZ2dnUVZ_tyinZ2d@xxxxxxxxxxxxxx
>> I want to distribute the sound to some
>> speakers at various location in the
>> house and have control of the volume
>> locally. Using Impedance Matching
>> Volume Control (IMVC) seems to be
>> the solution...
>
> That is correct.
>
>> However, If I want to add an A/B switch
>> in one location so that I can use the
>> speakers in that location for the central
>> source or the local source, it changes the
>> impedance of the central circuits.
>
> Switching one set of speakers out of the central amplifier will not hurt
> anything. It will lower the load on that amp but that is not a bad thing.
> If you're using auto-former (virtually all popular impedance matching VC's
> are auto-former) volume controls, changing the level or even switching
> out one room will not affect the volume in the others.
>
> In short, go ahead.
>
>> I've been told I need to use a speaker selector
>> box (and leave them all ON if I want) but I am
>> not sure I understand...
>
> That's bullshit. You don't need a selector box. Just set the IM circuits
> on each VC at least as high as the number of speaker pairs you're
> installing (ie, if you have 6 pairs, set the VC's to "8X").
>
>> Please see my installation here:
>> http://img518.imageshack.us/img518/4228/imvclc1.jpg
>
> Nice drawing. Scratch the selector box. Switching A/B won't adversely
> affect anything. The only issue I see is you seem to be planning to
> install 2 pairs of speakers peakers per volume control./ It would be far
> better to install one VC for each pair of speakers. With 5 pairs of
> speakers, set each IM circuit to "8X" and you'll be fine.
>
> BTW, I used to install these systems for a living. Now I just sell them
> online. Call if you need more help.
>
> --
>
> Regards,
> Robert L Bass
>
> =============================>
> Bass Home Electronics
> 941-866-1100
> 4883 Fallcrest Circle
> Sarasota · Florida · 34233
> http://www.bassburglaralarms.com
> =============================>
>
>
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