Sharing a subwoofer with 2CH and HTs rigs!

Hey, James. Velodyne is out of business. Talking to some pro audio guys about it to see what they say. They do this kind of stuff all the time, I would guess. 

Mesch- I certainly don’t need to have both amplifiers on, and don’t plan on it. My worry is that, by accident, at some point I WILL, and want to avoid that possibility! 

I’m also pretty sure most of the big box places like Best Buy do set-ups like this in their auditon rooms. I just want to be 100% sure as I really like this Velodyne sub and they’re not easy to find anymore.

Flynnrd, I understand. 

I had use a Niles SAS-1 as a switcher to select output between a AVR sub-out and a active low pass xover from a two channel preamp to a subwoofer via RCA cable without any problem. Actually, any line level source switcher/selector can get the job done, and I believe if both source are turned on will not causing any problem as long as only one source is selected and connect to the sub input.
The only possible problem I can think of is most of the RCA switcher/selector only switching "+" side and the ground connection remain connected. In some cases, it will introduce ground loop hum. The solution is modify a xlr switcher to rca so both "+" and ground connection can be switched on or off.
Another possible problem is "cross-talk", it can be overcome by simply turn off the unwanted source.