Wiring two receivers to one set of speakers?

[Resident Loser]

...a speaker selector in reverse probably isn't the way to go...as I recall, some of the have impedance-matching circuitry...probably will cause problems...but, and while it's probably well over $100USD and might be difficult to get (an retain the mfrs. 2yr. warranty) this thing looks like just the ticket:

http://www.russound.com/ab3.htm

You can also download the .pdf manual and check it out...looks pretty safe and fool-proof to me...

jimHJJ(...there may be others, but Russound's been in the multi-room/switching biz way before it became a thing...)

[spasticteapot]

...a speaker selector in reverse probably isn't the way to go...as I recall, some of the have impedance-matching circuitry...probably will cause problems...but, and while it's probably well over $100USD and might be difficult to get (an retain the mfrs. 2yr. warranty) this thing looks like just the ticket:

http://www.russound.com/ab3.htm

You can also download the .pdf manual and check it out...looks pretty safe and fool-proof to me...

jimHJJ(...there may be others, but Russound's been in the multi-room/switching biz way before it became a thing...)

Speaker selectors are just fancy switches.

If you're really worried, just get two DPDT relays and connect 'em to a switch and a 3v wall-wart. Turn on the switch, you connect your "good" reciever; turn it off, and it goes to the default of your HT reciever.

[Resident Loser]

Speaker selectors are just fancy switches.

If you're really worried, just get two DPDT relays and connect 'em to a switch and a 3v wall-wart. Turn on the switch, you connect your "good" reciever; turn it off, and it goes to the default of your HT reciever.

...and all, I'll squelch my immediate tendency to simply reply with "No $h!t, Sherlock"...However some may not be as simplistic as you make them out to be...but then, you must know otherwise to be so authoritative in your response...

There are any number of solutions to the OPs situation, unfortunately nearly all of them require some DIY skills and the tools with which to exhibit them...all the way from simple knife switches to logic-based devices...your electro-magnetic switches (i.e. relays) being one of them, albeit a redundant one. Do we really need a switch to activte yet two other switches? Why not use just a properly configured mechanical switch in the first place? Or at the very least use one multi-contact relay...Then of course, you should really package all the components safely and yada, yada, yada...the device I mentioned is a simple and elegant solution to the OPs switching needs, pratically custom-made to fit them precisely...

So-o-o-o, once you gather up the relay(s), switch, breadboard, power and packaging...and take the time to draw up a proper "schematic" (as simple as the circuit might be), cobble together something that may or may not work properly (you may only get one shot), may or may not look like it was put together by a 4yr.-old (skill and experience-dependent) and may or may not be safe (and certainly not UL-approved)...and again, this is all predicated by the avilability of those proper tools and the skills to use them...he may just be better of finding a proper component that fills the bill...simply plug and play.

jimHJJ(...and with no offense intended to the OP, I have a feeling that may just be what he's looking for...)