Personally I think your date there in your avatar is hott. me-ow..

As for the vent: 0.75 cuft @ 28hz tune with a 3" diameter vent = 30" long. At 25" long it will be tuned 30-31hz. Do whatever fits, you won't hear the difference.

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Paul Niwranski
1966 Cadillac Superior Crown Royale Limousine Hearse

If you're mirrors ain't shakin...you got taken...
RIP Member #8
Be careful what you wish for...