Well im my buddies 1999 monte carlo z34 on a 12" kicker CVX in a 2.2cubic foot box tuned to 37 hz and this box took only 20-30min to build,(shitt$ as hell) it did 142.1 at the dash on the TL, and i have it in my 01 monte carlo ss now and its very impresive the, amp is only 1/2 way up, and i can get the sub to get smelly, if i turn it up any more, and it has clipping indicaters and it does not clip at all!