yeah, that was unclear to me, too. but i was under the impression that it must have been labelled as such on the packaging or on the splitter itself. cam?
i would think it would work (provided it's kosher to split your sub out in that fashion), but since you're saying it's a "stereo (?) splitter", it seems it's made for something else besides the usual mono rca out on a receiver. the usual rca out on a receiver carries the (+)and(-) signal of a...