havent decided what class yet. with the daily driver i have now i hit 151 flat on termy with 2 pbx exstreme 12"s in 6 cubes ported to 40 hz with 1 autotek 3000.1 amplifier 2 gauge power/ground 265 amp alt in wich i do not beleive is correct because it doesnt seem to do its pottential and a yellow top x2 in a third gen eclipse fatmatted too hellllllllllo.