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

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 bought mine on ebay
https://www.ebay.com/p/Niles-Spk-1-Black-Speaker-Level-A-b-Switcher/1301529465
If you need to switching sub-woofer:
https://www.ebay.com/itm/Niles-Audio-AVS-2-Line-Level-A-B-Switcher/323424938106?hash=item4b4da0e87a:...
Or combination of both:
https://www.smarthome.com/niles-audio-sas-1-combination-speaker-level-a-b-switching-system.html

@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.)

How is the niles controlled?  Must one use a 12 volt trigger?

> 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.