4th order bandbass box for 2 PSI-8's

[xdq_21x]

View attachment 26555627

i designed a 3 chamber 4th order bandpass box design for 2 PSI-8's, dual 4 ohm, 600watt rms each, powered by Hifonics Brutus BRX1100.1D amp, wired to 1 ohm, i need help with a port for the ported area, i want a aero port tuned to 45hz....the dimensions are:

Outside dimensions:

Depth: 20in

Width: 31in

Height: 12in

Inside dimensions:

Depth: 20in

Width: 31in

Height: 10.5in

Both sealed inside chamber dimensions:

Depth: 20in

Width: 7in

Height: 10.5in

0.85ft3

Ported area inside dimensions:

Depth: 20in

Width: 14in

Height: 10.5in

i want to tune it to 45hz but i need help with the aero port i dont know how to calculate what size and length i need.

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