Amplifier and Speaker A/B switcher

I'm using a very obsolete Niles CPM -31 6x6 matrix to route sources to equalizers to pre or direct to amp in... however, it's very not ss and used carefully....
Bought new; mute everything prior to switching.  Simple paranoia keeps self out of trouble...🤞 *L*

Can loop in/out a JVC JX-S777 video selector for that sort of activity, since the pre can deal with the a+v functions if the mood strikes...

Note; None of this 'switchery' is done under the influence of Anything.
A clear mind keeps the kit intact, and I use a distribution style amp that can drive 6 to 12 pairs simultaneously.....and is made to do that,  Amp swap with no fear. ;)

If I was to go at it again, with the budget to do so....?

I'd chat up Maple Tree about their SCC-1 at minimum and don't cringe at the cost.

Save that for a custom quote for the one of your dreams...

Once considered diy'ng a matrix to replace the Niles; keeping the grounds isolated as well as the signal line just during layout would make you pause.

I've looked into full digital versions, shelved until I win a Lotto...

And a large one at that...

@panzrwagn is paying attention to level matches, which would be a boon.

Sudden loud can strike unintentional fear....as will *nothing*....

Van Alstine. I don’t have their switchbox but it may provide what you need. Apparently there was enough demand for it they did another run of them.

paying a huge amount of money just to make it so i don't have to swap my speakers between two amps just seems overkill. this is just my desktop nearfield setup.

@retroactiv On a leap of faith I bought a  Chinese made one from Aliexpress ($70) which is similar to your ebay suggestion.  Mine has a 2 to 1 switch.  It was offered with a higher quality model with a silver alloy relay, silver plated wiring, nice  metal case and toggle switch and full sized gold plated copper speaker terminals. I bought it originally to compare amps on a single set of speakers.  Didn’t notice sound degradation (using all the same speaker cables) so I now use it on my home theatre system so i can use a tube amp for 2 channel listening on the same main speakers as the HT system.  Works great meets my needs.  Find one you can try out that is returnable would be my suggestion.  

@tksteingraber thanks, can you link the one you have?