Impedance Matching Volume Controls vs. Speaker Selector Question

E-mail::
bdalton2@….com
Question::
Everything I read indicates I need to connect my receiver to an impedance matching speaker selector, from there to each room’s volume control and speaker pair. If I have impedance matching volume controls in each room, why do I need a speaker selector? What does the speaker selector actually do? Can I run parallel to each room’s volume control directly from the receiver without a speaker selector? Thanks.

Typically, in a home situation we suggest a speaker selector with standard volume controls because you can turn off areas that you wouldn’t normally use and those areas truly get taken out of the circuit. Then the other areas get more power and better sound.

In an application that you would have all the areas on most all the time, you could (and should) use just impedance matching volume controls only. When you turn down an impedance matching volume control to it’s “off” position, it’s not truly off on the back side of the circuit. It has to remain in the circuit or else the circuit would always be changing the load to the amp, therefor causing volume fluctuations everywhere anytime someone even makes one click of an adjustment.

So you can do it both ways. The downside to using the speaker selector method is that it costs a few more bucks.

 

Whole House Audio Question

Doug,

The Receiver you mention is really made for surround sound applications.
The “channels” it has are for the decoded section from movies to be
played back at the given positions of a home theater.

The more practical set up for you might be a set up with two basic
“stereo” type receivers with two speaker selectors.

Your other more basic option for whole house music is to have just one
receiver with an 8 pair selector.

By having two receivers you`ll have the ability to play two different
things at the same time in your two “zones” that are set up with your
selectors.

No problem not having the volume controls, they are optional with the
use of a speaker selector.

> Name :
> Doug Reed
>
> Message :
> I recently built a house and wired in a total of (14) 100-amp, 8 ohm speakers (4 in each of 2 rooms, and 2 in each of 3 rooms). The speaker wire is 16 gauge, and the wire “runs” are all less than 100 feet. I now need to purchase a receiver to power these speakers, and am considering the RX-8040B Audio/Video Receiver by JVC. This unit offers 130 watts x 6 channels, and 8 ohms of overall impedance. The receiver offers “dual room” capability, so it would be my intent to drive the two 4-speaker rooms with four of the receiver channels, and the three 2-speaker rooms with the remaining two receiver channels.
>
> I know that I will need speaker selectors to enable me to select any or all of the speakers at once. What speaker selectors do you recommend (note that my speakers are relatively low-cost)?
>
> Will I need two selectors to handle the two 4-speaker rooms, to enable me to take advantage of the 4 receiver channels that I intend to feed to those rooms?
>
> Do you anticipate any problems in powering up to 14 speakers at once with this amp?
>
> I did not install volume controls on any of the speakers. Do you anticipate that I will need them?
>
> Thanks for your help on this.
>
> Doug
>
>