I went to a db race last year in 06 with my truck s-10 with 2 10" mtx thunder 4500's with a small 500 bridged watt amp and i got a 140 but after the qualifying i but the subs in my bed with a cap on it with my three 12" JL w-1's with the 10"s and got about 149 and all of that was being pushed was a small 240 sony explode amp and a 500 wat memphis amp