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Discussion Starter · #1 ·
Hi im trying to design my first sonotube sub using the mach 5 ixl-15.2.2 i come up with 6 ^ft tuned to 18hz. the subs ts

T/S Parameters

Fs = 23.4Hz

Re = 3.7 Ohms

Qes = 0.41

Qms = 5.94

Qts = 0.39

Mms = 343.8 g

Rms = 8.51 kg/s

Cms = 0.135mm/N

VAS = 94.4 litres

Sd = 706.9 cm2

Xmax = 22 mm

i will be powering it with a dayton rack 1000 watt amplifier that has a preset hpf at 18hz can someone tell me how close i've come with my modeling? and what is the minimal diameter tube i can use i have it a 18" right now but would like to be more definite before purchase. Thank you

Premium Member
19,397 Posts
You're right on the money. Make sure you measure the internal diameter of the 18 inch tube as not all of them are the same. You'll need a 6" tube for a port that is 35 " long to keep the port air speed acceptable.

Here's all the dimensions you'll need to know. :T

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