Mark Audio Alpair 10.2 ML-TL port

[nirvana]

I would like to modify the round 2-1/16" x 4" round port
for a rectangular one ( 3/4" depth ) . please give me
the new dimensions.

6" wide x ???

 

[planet10]

2 1/16" diameter? 4" long?

Maintain the same cross-section & length.The higher R will introduce some R to the vent equations, usually a good thing in my experience.

dave