Finding ideal enclosure volume w/ Fs, Qts, Vas etc ??

[slaphappy]

Ok, I thought the sub would have a recommended volume for a sealed enclosure... NOPE. I have some books but they don't help. These are the specs in the manual:
Fs = 27Hz
Qts = 0.30
Vas = 3.2 Ft^2
Qes = 0.32
Qms = 5.0
Sd = 490cm^2

I don't know what any of this means. My book says:
fob = Fs/Qts ... so Fob = 90
Vof = Vas * Qts^2 ... so Vof = .288

The manual then says to always make sure you make the enclosure 10% larger than required. Vof = 0.317? Woofer internal volume = .19 Ft^2
So... 0.507 is the volume needed?

The manual keeps using ft^2 (feet squared). Isn't it ft^3 (feet cubed)?

HELP ME PLEASE

[jlaine]

Originally posted by slaphappy
Ok, I thought the sub would have a recommended volume for a sealed enclosure... NOPE. I have some books but they don't help. These are the specs in the manual:
Fs = 27Hz
Qts = 0.30
Vas = 3.2 Ft^2
Qes = 0.32
Qms = 5.0
Sd = 490cm^2

I don't know what any of this means. My book says:
fob = Fs/Qts ... so Fob = 90
Vof = Vas * Qts^2 ... so Vof = .288

The manual then says to always make sure you make the enclosure 10% larger than required. Vof = 0.317? Woofer internal volume = .19 Ft^2
So... 0.507 is the volume needed?

The manual keeps using ft^2 (feet squared). Isn't it ft^3 (feet cubed)?

HELP ME PLEASE

Download winisd from www.linearteam.dk, then input these parameters. It'll do the math for you, so you don't have to be concerned with the extra figures.

[slaphappy]

Thanks for the tip! I just downloaded winisd, plugged the numbers in, and presto.