Hello - I am seeking advice on the above sub, the JBL PSW-D115. No one on this forum has posted experience with this sub (search showed one post, which was not directly regarding this sub). Audioreview.com shows a wide range of opinions, few of which seem to be meaningful. 1. Is there frequency response data on this sub? 2. Does anyone actually own one? The unit I am considering is remanufactured, so I'm not anticipating any problems with reliability. But I have no experience with reconditioned products, so I don't know how reasonable an assumption that is. 3. Are reconditioned products a good buy? Thanks, Sam. BTW - What do they mean by digital amp? And why should that make a difference?