Best way to use mono speaker while connecting to a stereo o/p of receiver ?

I am not sure on this. I know, in general, you don't want to combine the speaker level outputs. That would likely cause a short.

I am not sure combining line level outputs is a great idea either. Maybe it works, maybe it doesn't, but it's more or less a short circuit You can rig a simple circuit to do it, but if you don't want to do that, I can think of a third option.

You could buy a cheap mixer, and I mean CHEAP. Like $50, or so. Kind of ugly, but Zzounds and Sweetwater sell them. You connect your zone out line level signals to the mixer.

Taking the mixed signal, you could then feed that into an amplifier.

A simpler option would be some sort of dual voice coil speakers that accept both a L and R speaker level connection. Whether your receiver could power up all those speakers, I can't say. I would recommend an affordable 200 watt / channel pro amp. Like the Behringer A500.

There may be simpler/cheaper ways to do this. So don't take my word for any of this. I just posted the only idea I currently have on the subject. I will think about it some more.

you could do this with a pair of resistors.

Yep. I saw a circuit and as you say, it's as simple a pair of resistors of equal value, one per channel. The resistors are connected at the other end for the mono output.

I thought about posting a link to the circuit showing a box with RCA connectors, but I figured the OP did not want to do all that work.

Have you bought the speakers yet for the room? If not then buy a dual channel single speaker. Google will turn up many examples.


Then in each room use an impedance matching volume control and split the signal at the receiver with a speaker selector.


They may not play very loud but you could always add an amp later if needed.

I'd avoid using just the left or right channel if only because sometimes things will sound very funny. When important parts of the music (say all the vocals - - they really used to do that) are mixed to the channel you're not listening to, you get un-vocalized sound. Or the drums might be missing or highly likely the piano or a guitar that is important to the mix overall.

I don't think there is a way to use the left and right power amps to power a single speaker, unless it is a dual voice coil type like jettore suggests.

Since it sounds like the wiring is not done yet, why don't you just install 2 speakers in each room? Also you might want to think about the volume controls in each room at this time. It's much easier to add them now and it's nice to be able to adjust each room as needed.

Personally if I could only do 1 speaker I would only do the dual voice coil option. You would still have to run 2 cables for left/right but it will sound much better. 2 speakers will sound the best still.

The extra cost sucks but this is usually one of those jobs you only get one shot at. If you check out Parts Express they do have a volume control for $20 so it's a little cheaper.

If you do decide to go the separate amplifier route, that amp 100 might work ok. I have seen some positive reviews on it.