Axiom Home Page Forums General Discussion Technical Questions Any reason why not to hook up two sources to Sub?

To keep this simple is there any reason I can't hook up two sources to the EP-125 sub?

I.e., one standard HT receiver using the "sub out" line, hooked via RCA cable to the sub, and a seperate system hooked up via the speaker wire passthrough option?

I would only use one system at a time.