I have a SVS "black box" for sale, never used it, bought it for my old setup, but since I sold the subs and I have a PB2-Ultra coming, I no longer need it. It's in perfect condition, I just have the box, not sure if I have the instruction manual or not, I will check. Price = $100 shipped in the US. Add 3% for paypal. PICS... Details can be found on the SVS website here.... http://www.svsubwoofers.com/marchandsubsonic.htm Any questions feel free to ask. Thanks!