I have two 10" Pioneer IMPP subs in a quadport bandpass box for sale. It is up on ebay and it is a great system. I am only selling because I bought a new Kicker square sub. Here is the link,

http://cgi.ebay.com/ws/eBayISAPI.dll...950367927&rd=1

Please take a look and e-mail me with any questions! Peace!