Right now im running two Eclipse TIs. One of my favorite subs compared to my DDs. Anyways, both MTX 9500 and the Eclipse TI are excellent subs. In my opinion, i think the eclipse can hit lower and sound better than the mtx 9500. But you can always adjust the SQ with the box, soo it wouldn't be too much of a problem. On the other hand, in my opinion the mtx 9500 is louder and can handle more power than the eclipse TIs. Now the TI pro is a different story. TI pro like mentioned above is geared towards SPL, but can still sound great.