it was at my local car audio shop. box is 4 cubes @ 32hz. more than likely it;s not a TRUE 147 but im happy with the results....oh the car is my 02 monte carlo ss
I had the same question as him. Im going to take the advice that I just read, set the High freq level to 20 and set the low to about 90 and start lowering until I think it sounds good I think I should stop around 70hz.