Ironically the part of world I live in, very very very very few people have access to DIY subs and requisite tools and to top it all ..... not even 1% of people know how must an HT sound. And I have to make best use of the available drivers here. I love the crocodillian approach in sound; one minute the sub is lying dead silent and in a spur of a moment it belts out the shock waves that it knocks the walls down. I literally had my wife bewildered and scream in horror movies. The sub I built by seeking help from this forum has massive foot print compared to my room size but it completely disappears sonically. You only know the sleeping giant is there in my room when a plane crashes or Kremlin blows up in MI-4. It literally cracks the floor and u feel the shock waves travelling through u. Definitely not for the faint-hearted . And trust me Alpine does rock big time. I have heard REL Stentor and Gibralter in HT setup, but mine does squash them in HT. But still I feel it is a tad crude coz it is a cheap test box made out of chipboard, so um gona do the final build with mdf.