No, that's just the generic name for the .1 channel (bass effects) in Dolby Digital, DTS, etc. That channel need not incorporate all bass in the production, but is often used for that by pre/pros or receivers when the speakers are set to small.

In short, it's something of a nebulous term, and I'm guessing Rick has the right of it.

I am the Doctor, and THIS... is my SPOON!