Multiple speaker outputs to 1 speaker?

[Thunderknight]

I've been searching for a product that will combine (mix) multiple (4+) *8 ohm speaker/headphone level* outputs to 1 speaker ouput and provide a master volume control (easy to turn down if the phone rings, for example).

I've found a lot of threads over the years on this topic, but most of them don't have clear-cut answers...either products that may or may not work (some were suggestions but untried), or are not available any longer.
There are plenty of audio mixers out there, but most seem designed for mic or line level devices like in a professional studio setting, not speaker/headphone inputs from scanners. Comments appear uncertain on whether this will work or will lead to distortion.

Ideally, it would have select/unselect type audio (like a console), but even just 1 mix is fine. A master mute would be great, but a master volume will suffice.

The NCS-3230 (recommended in several older threads) would be perfect...if it wasn't discontinued. (ARG!)

So, does anyone know of a currently available product that will accept multiple *speaker/headphone level* inputs and provide a combined audio output?

Thanks

 

[homeinva]

i run a radio shack 32-2056 4 mix mixer this is the older model your need a 9 volt power converter
4 of the 6ft rca to 1/8 mom plugs
rca stereo out cables to a set of gigaware computer speakers stereo rca to 1/8 stereo plug to the speakers
and have no problems running 4 scanners off one set of speakers