After I have fiddled with this sub, for my specific room here is the following info:

* For music, I recommend the lowest possible crossover point you can adjust it to. The slope on the plate amp is gradual, so I'd keep it under 70hz. Crossing over higher will result in the loss of omnidirectional bass, and probably excess room loading. If you want a sub like this to cross over higher, I recommend a pair of the 12" kits.

* If you use this unit from a 100/50hz transformer, you will get 50-60hz hum *IF* the sub gain goes past 3 o'clock on the dial. This effect is reduced/eliminated if you cross the sub over 40hz or lower.

* I prefer to set the parametric EQ to the lowest area (20) max boost, wideband to compensate for room/box loss

* The bass will be limited by room dimensions. IE: in my 20 x 16 room, I can tell the room cutoff is in the low 30hz range. Deeper bass is appearant farther away in other parts of the home.

*This sub is very fast, very powerful and it has no trouble keeping up with whatever speaker you want to mate it with. I am certainly glad I built it and have no regrets, especially for the price.

*I may apply some cherry veneer to give it a bit more class