OH... MY... GOD... I remember my very first subwoofer.. I bought it when I was 16. It was a radio shack brand optimus 10" 120 watt rms sub.. very boomy and very crappy now but at the time i thought I was in bass bliss. fast forward to 2004 and I am almost 23 and finally upgrading subwoofer. Rythmik audio 380@4ohms + adire tempest + proudly self built box 214L box + 21x18x8 room = what have i gotten myself into Using a 15-80hz freq. tone CD i played with the various levels of bass... I have NEVER felt or seen anything like this before. At 20 hz i saw everything shaking and yet I heard nothing ... At 30 hz everything was shaking even more violently... And all the way up to 80 I swear this has to be the cleanest bass i've ever heard in my life. I only have the biggest grin as i pound my entire house with insane bass.. NOW my home theater is FINALLY complete... (the bass at 20hz is so powerful that my projecter which is ceiling mounted starts to shake badly and rotates to the left a little. I have some serious rattling issues and room fixing to do now to make the bass even cleaner. I can't wait for my friends to come watch a movie. I would show some pictures but i don't know where to host them.