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
The web page is a bit confusing, but this looks like it would also work:
The Decware Zen Switchbox model ZSB http://www.decware.com/newsite/ZSB.html
Doesn’t look like it is for speakers....
It is a line level switcher/selector.
Post removed 
The web page is a bit confusing, but this looks like it would also work:
The Decware Zen Switchbox model ZSB http://www.decware.com/newsite/ZSB.html
Am I right?
I ordered one from the eBay seller. Looks like all I need is a twelve volt source on a switched power strip. 
> How is the niles controlled?  Must one use a 12 volt trigger?
Yes, for the Niles SPK-1.
The discontinued model, the ABS1, does not need a trigger. I saw the ABS1 for sale on ebay.

@reubent
> No time to go into details at the moment. However, if you want more detail, I can get back to you in a couple of days....
Yes, thanks. Here's my equipment:

  • Receiver: Yamaha AVENTAGE RX-A1070
  • Amp: Yamaha A-S801 Integrated Stereo Amplifier
  • TV: LG 4K OLED65C7P
One reason I don't want to run the L&R front pre-outs from receiver to amp is that the receiver introduces about 1 second delay in the audio coming from the HDMI connection on the PC. There is no problem with video and audio sync'ing. The A/V receiver by itself seems to be working properly. I have assumed this was a "feature" of the Yamaha (like a buffer) because my prior Sony receiver did not do this (same 4K TV, same PC, same settings, etc.).

For most scenarios, that 1 second delay in audio starting is not a big problem, so I have not put any time into investigating it.

However, whole-house music distribution that audio delay from running the signal through the receiver will cause this one room to be out of sync with the other rooms. I can avoid that by running the sound from PC to DAC to Amp to speakers without going through the receiver. (Alternatively, I guess I could figure out if there is a way to get rid of the delay in the receiver, but that might end up requiring a lot of time to sort out.)
What A/V receiver? What Amplifier? Is it an integrated amp, or a pre-amp and amp combination? Does it have HT bypass or a processor loop?

I've run several different combo systems in the past, connecting the L&R front pre-outs from my HT receiver into the HT bypass / processor loop on an integrated amp or a pre-amp. This solves the problem because you are never changing speaker cable connections. Once you have calibrated your HT with the amp connected to the HT Bypass, all of your switching is done electronically.

No time to go into details at the moment. However, if you want more detail, I can get back to you in a couple of days....
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.