I have a 20-39 PCI that is about 5 1/2 years old. This is the powered model, you don't need an external amp to drive it. I haven't used it in the last year and half due to remodeling and rearranging things in my house. I'm getting ready to move and need to sell. Sub is in excellent condition. It is not hooked up, the rest of my gear is in storage, but I'll guarantee it works. Local pickup only. I live in downtown Atlanta in Grant Park, I'm a block from the Atlanta Zoo (and near both I-20 and I-75/I-85/downtown connector). Email me at firstname.lastname@example.org with any questions.