Box volume /Port volume

shopvac New member Username: Shopvac Post Number: 9 Registered: Jun-10	Posted on Friday, July 09, 2010 - 00:49 GMT Ok guys, I am a bit confused ! lets say I have a box volume of Vb, is the port Volume (Vp) already in the box volume (Vb)? or would it have to be added on? Thanks.
Canaan Gold Member Username: Southernrebel Monroe, Louisiana Team Audible... Post Number: 8115 Registered: Mar-04	Posted on Friday, July 09, 2010 - 01:03 GMT No. Vb is net volume, less port volume. So, if you have a 1.5cuft Vb (net) box and a Vp (port volume) of 0.5cuft...the total gross volume internal is 2cuft.
shopvac Bronze Member Username: Shopvac Post Number: 11 Registered: Jun-10	Posted on Friday, July 09, 2010 - 03:35 GMT Thanks Canaan.
sean Platinum Member Username: Insearchofbass 2 hifonics 2607s, 2dcSounds12xls SPL\idmax12SQ Post Number: 14524 Registered: Jun-04	Posted on Friday, July 09, 2010 - 03:43 GMT 16 sq per cf is the rule for port area
shopvac Bronze Member Username: Shopvac Post Number: 14 Registered: Jun-10	Posted on Saturday, July 10, 2010 - 04:47 GMT '' 16 sq per cf is the rule for port area " this makes things easier.... Thanks guys, it's all clear now...
sean Platinum Member Username: Insearchofbass 2 hifonics 2607s, 2dcSounds12xls SPL\idmax12SQ Post Number: 14636 Registered: Jun-04	Posted on Saturday, July 10, 2010 - 04:49 GMT no i mean you need 16 square of port per cubic foot of net box volume is all I was saying
Canaan Gold Member Username: Southernrebel Monroe, Louisiana Team Audible... Post Number: 8122 Registered: Mar-04	Posted on Saturday, July 10, 2010 - 05:18 GMT You don't have to use that much port area for most subs. In many low to mid power settings, 10-14sq per cu is fine. The total amount of port are you will need will be dependent on the subs. 14-16sq per cubic foot works well w/ higher power or a sub that behaves in such a way that is requires that much. In many cases, a single 4" flared port is fine w/ a 2cuft box and 1-12" sub. Shopvac, What sub are you using?
shopvac Bronze Member Username: Shopvac Post Number: 16 Registered: Jun-10	Posted on Saturday, July 10, 2010 - 05:50 GMT Canaan ---- 2 R/F P3D210 (Total RMS 800watts) Sean --- is that 16 sq in ?

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