Well, today I built my box, still not finished though- have to make clamps for the plug and resin the inside, and a few other things...but here it is... 9.4 cubes tuned to 47 hz, plug for 33 hz http://www.nugs.auto-forums.com/newbox2.jpg http://www.nugs.auto-forums.com/newbox3.jpg http://www.nugs.auto-forums.com/newbox4.jpg BTW- A 18" SX will be going in, powered by 4 American Bass CX1200d amps, a pair strapped @ 1 ohm for each coil