Holy Crap!!.. I did it. It LIVES!! I was at GC the other day and played through an Ampeg 8-10. It had that "in your kidneys" thing. After that I'm thinking of how I can make something sealed. I ain't kickin $1000 for the Ampeg. So I went inside my Mesa Powerhouse 1000 (115 & 4-10s) and took some dimensions. I had to make 2 pices with the notches for the inside bracing. I used rope calking so I can reverse it. So I sealed the upper and lower 2-10 compartments. I figured the 1-15 has about a 4.5 (22.75"x15"x15" cu ft ported compartment. Each 2-10 box is about 4.0 cu ft. "10"x 15"x22.75"). I stuffed the cap out of the 10s boxes with fiberglass and left the dacron stuff in the 15 compartment. ........It sounds tight like the Ampeg. (Not quite as punchy), but with a crisp deep bottom ans a lot of sustain. I'll tri it out tomorrow when the neighbors are away and crank it.............. The 15 is a Peavey BW and the 10s are Eden XL drivers.