Richard Crowley wrote:

"Larry Gagnon" wrote ...

can I connect the 2 amp outputs to these same speakers?

Simplest would be a switch. If you really want to get fancy,
you could wire a line-powered relay into the power strip of
your home theatre system. Then when you power-on the
HTS, it would transfer the speaker connections. With all the
HTS accessories out there, I'd bet that somebody already
makes/sells this kind of thing. If not, maybe I'll start! :-)

You mean there are people out there who haven't made one?

My HT amp has a 2-prong power outlet that powers a 2-way 4-pole relay.
You could also use a master-slave mains extension block so when you
switch on the HT amp it also switches on the relay and the subwoofer amp.

A 4 pole relay is best so it switches the amp's ground outlet as well.
I used a 12v relay and an old 12v psu, as it was what I had in the junk box.

--
Eiron

I have no spirit to play with you; your dearth of judgment renders you
tedious - Ben Jonson.