air port velocity?

[loudlittlefvkus 10+ year member]

Im designing a box for my 2 compvx 12s, 3.5 cubes at 34 hz. In winisd the rear air por velocity tops at 75, is that too high? I know in the 60s is best. My port area is 14.5x3

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[jockhater2 10+ year member]

@dbeez ;

 

[DonH 5,000+ posts]

Honestly, when I design my 3rd order and up enclosures, I try to keep my vent air velocity below 35m/s. Also round corner of the entry and exit of the vent to reduce the possibility of "chuffing"

you are on the right track with looking at the Vent air velocity. Most novice designers overlook this aspect and go with some "rule of thumb"

 

[loudlittlefvkus 10+ year member]

forgot to add the unit actually, its 74 ft/s, and 35 m/s= 114ft/s. i guess ill try it out then and see how it goes, its actually my first box design. its been too cold up here to build through the winter