Wow! The Tumult can really play loud. It's clean too. I have it mounted in a 6.15 ft^3 box tuned to about 19.5 hertz. I am using a Keiga 52100, 1,000 watt plate amp from Kyle at Acoustic Visions. I only listened to a little music (Big Head Todd and the Monsters Perfect World) and a snippet of a movie (Star Wars Episode II). I already said it was loud, but I must tell you, everything that was not hot glued to a vertical or horizontal surface in my room was set abuzz by the monstrous output of this beast. Everything in my house loved the sound of this beast so much that it started vibrating in sympathy with the sub at higher output levels. I am really going to try to isolate some of these rattles. My wife was returning from a shopping trip and she states that the front door to the house was shaking in its frame. Any suggestions? Also, I have not tuned the beast with my BFD (I have room modes aplenty so this test is not the final word on sound quality). In the near future I hope to post my models used for designing the beast, some construction pics, some finished pics and some pics of the frequency response of the finished product. Do any of you have any recommendations for free webhosting? I would like to establish my own website for the beast.