Yeah, the lower the tuning freq. the deeper the bass and the flatter the frequency response.....the only downside is the depth needed to get it peaking low (under 30hz). I agree with Joe, around 32-35hz will sound deep. Also worth a note, the box (in-car) will "peak" between 5-10hz higher than what a box program tells you its tuned to. This is due to a few factors i wont get into
So yeah, actual peak should be around the 40-45hz mark.....almost perfect for a daily system. You dont really want to go too much lower, most normal music peaks around these marks so it'll go well.
Have you got a Termlab now Joe? Thats the only way youre gonna tell where the peak frequency is. Plus you'll need to do it outside of a car, the resonant freq. of the car will give you misleading results.
Tuning to a similar freq. using a larger box will require one of two things:
A) Larger port with the same depth as the smaller box.
B) Same port, made shorter.
