I finally added a 12" sub to my GP Monsoon system and couldn't be happier. After reading many threads and blogs, I ordered an MTX-REQ line out converter for $64 on Amazon. It took about and hour to wire it up. Hardest part was getting the power wire through the gromet on the passenger side. The LOC has a remote wire that powers the amp on, so you need not worry about a seperate switch. I am also using a late 90's Kicker Solobaric 12" sub in a sealed enclosure with an old Orion Cobalt 260 amp that I had lying around for the past 15 years. This was one easy upgrade if your ok with the stock volume and crystal clear bass at max volume.
