In standard Bass Reflex design one uses 1/2 Vb to calculate each duct.

I admit to being kicked-out of MENSA, so how do I proceed?

Note: I want to build "Konus Audio Essence" style enclosures (only ones with sufficient WAF) for my EV 12TRXB's (3.8 ft^3 as per PiAlign) and think dual down-firing ducts will provide optimimum 'balance' -- not to mention looking way-better than one little duct positioned assymetrically on the front. (Severe WAF deduction.) ; )

Just musing -- and remembering how dumb I felt sitting on the lawn in front of the MENSA house... ; )

By using the Fb formula at JL Audio, and running it twice -- once for each 1/2 Vb, I came-up with 2 X 2.0 in. ID X 5.25 in. long ducts -- still tunes 3.8 Ft^3 to ~ 28 Hz, as called for in PiAlign for a single EV 12TRXB.

Q: Does doubling the Vent Area effect Damping Bandwidth? Real-World output?? Sound Quality???

Respectfully,

Stephen ; )

• Fb formula at JL Audio