Re: Porting/Venting? How do you know what size Vent is what Freq in What size Enc?
Yes. Porting boxes is an art/science....luckily I'm an artistic scientist
The size, length, surface area of a port are all dependant on the tuning frequency and size of the box. Nothing else matters here, however, each of these variables are totally dependant on the others.
Basically, if you change the height and width of the port, the length will change as well. More surface area generally means a longer port. There are tons of programs out there to help you figure this out without doing all the math, but I'd suggest you learn the formulas before you start messing with a calculator. Just like algebra in Jr. High....you gotta start with a pen and paper before you move up to a calculator
Smaller boxes need longer ports to achieve lower tuning frequencies as compared to larger boxes.
If you're trying to decide what frequency to tune your box, here's some help
26-33hz = SQ (sound quality. your box should pick up about every note and have a decently flat response when tuned in this area.)
34-42hz = SQL (sound quality with some balls. Will get louder and have a slightly peakier response than one tuned in the lower region, but will also fall off a little more above and below the tuning frequency.)
43-?? = SPL (Sound Pressure Level. Will get loud and sound like ****.....but boy, will it be loud)
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