Bests way to connect two input sources to one set of speakers?


One source is a stereo amplifier. The other source is an A/V receiver. I use the A/V receiver when watching movies. I use the amp when listening to music. I have one set of speakers and I am looking for a convenient way to connect them. I would prefer automatic switching, but manual switching would be OK if that's the only affordable option.

I heard about the Niles SPK-1 but it does not seem to be manufactured any longer. What are some recommendations?
lowoverdrive
I found the Niles SPK-1
Speaker Level A-B Switcher; 12V-Triggered | Niles Audio https://www.nilesaudio.com/product/speaker-level-b-switcher-12v-triggered-FG00240
Cost is around $130 I think.

The discontinued item is the Niles ABS1 Black (FG00271) Speaker Level A-B Switcher.

There is no reason to spend thousands on an additional set of speakers when a switch box will do the job with no degradation in sound quality. Furthermore, a 2nd set of speakers in the same room, even if one did want to spend the money, is usually not a good acoustic solution at all. Only one set of speakers can be positioned optimally.