Video Asylum: This is the thanks I get? by Joe Murphy Jr

Another question?
:-)

Actually, it depends on a few things. At the end of the day, you can always rig up, I mean uh... improvise, something (though it will not be a purist approach) to suit your needs -- even if it's just a simple line level or speaker level switch.

For the best response, maybe you could answer a few questions:
What type of sub do you have, powered or passive?
If it's powered, what type of inputs does it have?
If it's passive, what are you using to drive it?

I don't know how many subs are out there like this, but Krell has a nice input configuration on one of their powered subs. There are 2 low level (as well as high level) stereo inputs for music and 1 low level (as well as a high level) mono (LFE/.1) input for movies. This allows for a audio and video system to use the same sub. I believe it may also automatically select the correct input based on whether there is a signal present at that input, but I'm not positive on that aspect.

Price? Well, if you have to ask...