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that looks very cool Mike.  how much are they and do you have a link for where to get them?

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I wonder how transparent it is.  (Not that transparency has been a factor in past decisions.  I guess I read too many Gearslutz threads now.)

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I want to know if the speakers that are turned on go POP. If so I'll buy as many as I can get my hands on. I want to write POP tunes from now on.

I wonder the same thing. Switching speakers isn't as simple as, well, throwing a switch. How about popping the lid off that thing and posting a photo, Mike?

If it is a line level switcher then the popping problem is easily solved by using make-before-break switches.
The bigger challenge is avoiding loading problems if you decide to drive all four loudspeaker pairs at once!
I built a similar box several years ago, but I used relays (make before break) and momentary switches (and a handful of diodes<G>) so that only one loudspeaker pair was active at any time.

I also had four sources on a rotary switch, which worked, except that I only needed two inputs, the stereo converter and the PC audio output, for those times when I just wanted to surf the net and didn't want to re-route the audio<G>!

Total cost was under $60.

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Following this thread with interest. Thanks guys!