hey guys... just to let you know i recently took a leap to build an EBS, an 8.8 ft3 sub!, using the mj18 and a rythmik amp plate and it is awesome! i am still playing with it and making a few adjustments to make it sound tighter. the box is large as you can imagine, 42 x 17.5 x 27.25 external dimensions with a port slot of 2.25 x 16 x 29, tuning at 18hz. it sits behind my couch down firing, with my computer table on top. so far, it sounds great but i need to make more adjustment with adding and subtracting fiberglass. placement of my room has been a challenge since my room is so big with 20' ceiling, with a lead to a kitchen. it's a z shape room with no wall for bass reinforcement at listening position. when testing the sub with test tones, the sub is has really punchy and great extension bass. it can play really loud. anyone has any thought about placement, please share.... overall, the mj18 is a great driver. it plays plenty loud, making my hsu vtf3 sounds silly! anyway any of you have experience with mj18 let me know on placement and other experience i would appreciated... happy listening..