per cube?? or total port area? where are you coming up with these port area numbers?if it was 3.75 net it would need to be 16.95
per cube?? or total port area? where are you coming up with these port area numbers?if it was 3.75 net it would need to be 16.95
exactly u use net volume to calculate for the length the 3rd final volume is vb that the sub actually has available.ha nope. gotta get your port length from your net volume, then calculate its displacement then use that to give you your third box dimensions to account for the port displacement
yea thats what i said it would be close to before i never did the exact calculation. but the problem was he was going by the volume before his port displacement. he needs to 16. 96 or whatever you said with a net volume of 3.75. box needs to be reworkedlength
trooofff. your need more boxx recalculate your box by taking the port and finding its displacement then add that to the sub displacement, and bracing displacement, and your net volume, and you have your gross. thats how you get your last box number i usually figure out my depth lastexactly u use net volume to calculate for the length the 3rd final volume is vb that the sub actually has available.
every sub maker on the planet that i know of uses this formula ( robert smalls ) to do tuning.
hell even the online calculators use it and verify my tuning is correct. you can not account for an unknown volume ( port volume ) u have to have a port to know its volume to deduct from the gross to get the vb lolz.
depends what your going for really...i like little boxes with little port keeps box rise down and gives cone control and smaller port play lows better