Hi guys. I havent been around in a while, i got more into the performance part of cars and away from the sound part. Here is my story, i have had a set of 2 10" pioneer premier 1500 spl's since they came out and love them. I recently put them into the girlfreinds car to save weight in my car. Well i decided i needed some kind of bass and bought a new sub. I love just about everything with the spl's, but i got a good deal on a nother sub so i picked it up. What i bought was a Mmats Pro2.5 15". I was just wondering if anyone new anything about them. Right now it is in a 1.75 sealed box and sounds alright but nothing like my pioneers. If anyone can give me some information i would truely appreciate it. Like should i go ported, they are rated at 400 rms would it help to send a few more at them, ect ,ect. Thank you guys.