April 29, 2001
Originally posted by aaaaggh:
big and round round is the best small and boxy is for cars with no space. ever seen a small square amphatheatre? ever been a in a vw bug (round) with 2 mcintosh 12`s? if you have youd remember it. small and square is not friendly to sound waves. this is why people use poly-fil, to make the subs `think` they have more air not less. try taking the same setup and go back and forth between a suburban(big) and a civic(tiny) with it and youll find that you get more spl in the suburban.
I`m sorry, you have things way backwards, or we are talking different things here.
A large area is much better for highs and mids, but makes it much harder to get good bass. A smaller car has a larger transfer function and therefor boosts bass much more. Bass is amplified from the small area, where as mids and highs are reflected around and therefor harder to get right, so in that respect a larger car is better.
Have you ever been to a competition? The true SPL heads use VERY small cab areas for the subs. This gives a much higher spl, because of the small amount of air that is being compressed. This weekend I went to a local comp, it was won by a Thunderbird with a wall and a single 15. The dash, door panels, floor, and center console were all built in to take up as much space as possible. It hit 159.8 dB. Impressive. There was a van there using 4 15`s and nearly 2400 rms and he only got 146 dB. LARGE SPACES SUCK FOR BASS, PERIOD. If it was so great, all competitors would use full size conversion vans with the raised roof for the most possible airspace. Funny, ALL the top competitors use walls and small ass interiors.
As for the polyfill, that has to do with the BOX, not the enviroment that the box is in. Putting polyfill in a speaker box won`t make the car it is in seem larger, it changes only the box`s acoustics.
I have installed MANY systems. Smaller cars are better for bass. Try your Suburban to Civic test with equal equipment and a proper install. I GUARRENTEE the Civic will have louder bass. My friend moved his system (two 12W-0`s) from his extended cab S-10 to his moms Caravan. EXACT same setup, and I bet he lost easily 3-5 dB when it went in the van. With such larger airspace the bass is weaker.
I am very much into car stereos. I do many installs, and I know my stuff pretty decently. Small cabins are far better for bass. I would bet my life on it.