[C]

Hello! I have searched the archive but can't find what I am looking for.
Similar question but mine has a little extra that I can't figure out.

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. 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.

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.

Please see my installation he
http://img518.imageshack.us/img518/4228/imvclc1.jpg

It shows want I want to do. There are some questions too. All the help is
welcome.


Thanks


Chris

[Barry Mann]

In , on 01/03/07
at 10:59 PM, "C" said:


Please see my installation he
http://img518.imageshack.us/img518/4228/imvclc1.jpg

It shows want I want to do. There are some questions too. All the
help is welcome.

Russound, Sonance, Niles, and others make impedance matching volume
controls that will work fine in your system. There is no need for the
speaker selector box, just take care to strap the volume controls
correctly.

Amplifiers are upset when the impedance is too low (too many speakers).
The controlls will fix the problem of too many speakers. When your A/B
switch transfers two pairs of speakers, neither amplifier will be in
danger. The second amplifier will be within it's design limit with or
without the controls and the first amplifier will see a reduced
workload when the speakers are switched to the second amplifier.

If either amplifier is 100 Watts or more, I recommend adding a low
filter between that amplifier and the controls (one two channel filter
per amplifier).

-----------------------------------------------------------
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[Eeyore]

C wrote:

Hello! I have searched the archive but can't find what I am looking for.
Similar question but mine has a little extra that I can't figure out.

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.

Why do you think it needs to be impedance matching ? Unless it's a valve
amplifier there's no issue about 'matching' speaker loads ( other than ensuring
the load impedance isn't too low ).

Graham

[Eeyore]

Barry Mann wrote:

The controlls will fix the problem of too many speakers.

How ?

Graham

[C]

I originally posted to 4 different NG. I did not know where this question
would fit better. I received some good answers he
http://groups.google.ca/group/alt.ho...1ee08fead89f98

Thanks

C


"C" wrote in message
.. .
Hello! I have searched the archive but can't find what I am looking for.
Similar question but mine has a little extra that I can't figure out.

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. 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.

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.

Please see my installation he
http://img518.imageshack.us/img518/4228/imvclc1.jpg

It shows want I want to do. There are some questions too. All the help
is
welcome.


Thanks


Chris

[AZ Nomad]

On Thu, 4 Jan 2007 11:35:19 -0500, C wrote:


I originally posted to 4 different NG. I did not know where this question
would fit better. I received some good answers he
http://groups.google.ca/group/alt.ho...1ee08fead89f98

That is ****ing obnoxious. Next time, just post one and put the
*appropriate* newsgroups all together, separated by commas, on the
newsgroups header line. Google for "crosspost" if you're still clueless.

What you've done is start four independant threads instead of just one.

P.S. Look up L-Pad to answer your original question.

[C]

I read a lot of NG, but never posted before. I did not know how to tie my 4
posts together. I added the link to the other forum so people searching the
archive could still get the answers that are not here.

But I learned my lesson. Thanks for educating me and not just flame me.


C

"AZ Nomad" wrote in message
...
On Thu, 4 Jan 2007 11:35:19 -0500, C
wrote:


I originally posted to 4 different NG. I did not know where this question
would fit better. I received some good answers he
http://groups.google.ca/group/alt.ho...1ee08fead89f98

That is ****ing obnoxious. Next time, just post one and put the
*appropriate* newsgroups all together, separated by commas, on the
newsgroups header line. Google for "crosspost" if you're still clueless.

What you've done is start four independant threads instead of just one.

P.S. Look up L-Pad to answer your original question.

[Peter Larsen]

C wrote:

I read a lot of NG, but never posted before. I did not know
how to tie my 4 posts together.

We all learn, no problem. However imo it is not the best solution to
have central amplification. To me the neatest solution is acheived via
distributed amplification, simplest perhaps active loudspeakers.


Regards

Peter Larsen