4th. order bandpass

[RAM_Designs 5,000+ posts]

Go 1 cube sealed, 1.25 ported, 25in^ of port at 47hz per sub. If you were doing 4 12s, it would be 4 sealed, 5 ported, with 100in^ of port for example.

Agreed. Except 25in^2 of port per ft^3 would be 125in^2...I use around 20in^2 myself as that generally makes port length not too terribly long.

 

[82 cutlass 10+ year member]

Agreed. Except 25in^2 of port per ft^3 would be 125in^2...I use around 20in^2 myself as that generally makes port length not too terribly long.

Yeah he was going by 1.25 ft3 per sub...that's how it came out to 25in^s for each 1.25 ft3