Can you send two outputs into the same speaker (Surround A + B Channel)?

Question

I have a Sony STR-K900 Av system. It enables you to choose speaker channels: A, B or A+B.

It does not come with B channel speakers. What I'd like to do is wire the Surround output (A channel) and the B output to the same speaker, and then turn on only A or B

(the point is so I can turn on only the rear speakers at night, which are by a bed, so the front speakers don't fire and bother the neighbors)

If A is off and B is on, if I connect B to A, will I cause any disturbance, noise, or short?

Is this do-able?

The inputs are:

A Chanel:

Front: L, Center, R
Surround: L, R

B Chanel:

L and R

Answer 1

YOU CANNOT DO THAT. The A surround output is always on, and by connecting that to the B front speakers output, (when you switch to B output) you are connecting two amp outputs together which can damage the amps.

Your best bet is to get a speaker switch that will connect your surround speakers to the B output and disconnect them from the surround channel (you can use any kind of DPDT switch--ask for one at Radio Shack or other electronics store and tell them what you want to do). Then set your amp to "2ch" mode (no surround) you will get what you want: main sound from the back speakers. However, the subwoofer is still active; either turn down the bass or use another switch to disconnect it.

Answer 2

That doesn't even sound like a surround receiver. Neither A nor B are surround channels. If you play them together, you're splitting amp power equally between them, and you can't independently adjust anything like volume or leves. You're just running 4 channel stereo. I'm not sure what you mean, but the signal going to the surround speakers is not a full bandwidth. That's why you only need little speakers there. No deep bass goes through to those channels. A and B are full bandwidth stereo channels. Surrounds ar different.

Answer 3

not until it incredibly is a twin voice coil speaker (not consumer-friendly, different than in subwoofers). in case you connect 2 distinctive amplifier outputs to an identical speaker terminals, you will reason problems with the amp. A twin voice coil speaker has 2 remoted coils linked to an identical speaker cone, so which you will connect them to cut up amplifier outputs.