With my stock radio,batt,alternator....1 punch 360.2 amp...and 1 fosgate 12"HX2 dvc sub it hit 134.5 today in my 2001 Blazer.....im gunna make another abc box, about .5cubes bigger in hopes to reach maximum SPL with my little system....137 would be nice.....I also made another box yesterday....i tried out a 1.25 cube sealed box for my sub...i didnt have it in my Blazer more than 15mins and i allready was taking it out and putting the ABC box back in....check out the pics of my new paper weight on page 2 here--->box pics