MuzZa0nXTC Posted May 26, 2010 Report Share Posted May 26, 2010 So basicly ive always had a sealed box... now ive decided to make a ported and have no clue on how to work out the port size. anyone know exactly how its done? i wanna get the port size all worked out so i can start a build log including the sub box and custom fiberglass parcel shelf and shiz pleaze help. Quote Link to comment Share on other sites More sharing options...
Alex K Posted May 26, 2010 Report Share Posted May 26, 2010 measure from the middle of the port. Your port height will usually be 1.5 inches less than your total box height. Your width and length is what you mess with to determine the tuning. Look in the encclousures section and there's a tool called torres calc, download that and mess with your dimensions. a good tuning is usually in the neighborhood of 30-40 hrtz, but it all comes down to preferences. Quote 2006 Nissan Z Track. My Feedback Thread i used to think a band pass was something you were around your neck or something. Link to comment Share on other sites More sharing options...
MuzZa0nXTC Posted May 26, 2010 Author Report Share Posted May 26, 2010 measure from the middle of the port. Your port height will usually be 1.5 inches less than your total box height. Your width and length is what you mess with to determine the tuning. Look in the encclousures section and there's a tool called torres calc, download that and mess with your dimensions. a good tuning is usually in the neighborhood of 30-40 hrtz, but it all comes down to preferences. Thanks heaps bro. do my subs make any differance to how big it should be? Quote Link to comment Share on other sites More sharing options...
baaudio Posted May 26, 2010 Report Share Posted May 26, 2010 yes they do. you should always design the box around the volume your subs require Quote Team NWSPL baaudio Build Log 2001 GMC Sierra walkthrough 4 Mechman Elite 370s, 10 AGM batteries, 3 Crossfire XS v2 18s, Crossfire 8k Link to comment Share on other sites More sharing options...
Guest Posted May 26, 2010 Report Share Posted May 26, 2010 Thanks heaps bro. do my subs make any differance to how big it should be? well the general port area (width times height of port) for any box is 12-16 square inches per cubic foot of box area. so if you have a 3 cubic foot box. 3*12 = 36 and 3*16 = 48. so shoot for 36-48sqin of port total. Torre's calc tells you how much port area is recommended (port area range) and how much port area your box has (port area) Quote Link to comment Share on other sites More sharing options...
MuzZa0nXTC Posted May 26, 2010 Author Report Share Posted May 26, 2010 yes they do. you should always design the box around the volume your subs require Well this is what my subs require... but i dont understand it :S the paper says "Port (in.) [dia. x length] 4 x 8.5" whats 4 x 8.5? how big is that? i know its inches but... yeah im so confused haha sorry for the nooby as questions XD Quote Link to comment Share on other sites More sharing options...
Alex K Posted May 26, 2010 Report Share Posted May 26, 2010 that means you need your port to have a diamater of 4 inches, and a length of 8.5 inches. Quote 2006 Nissan Z Track. My Feedback Thread i used to think a band pass was something you were around your neck or something. Link to comment Share on other sites More sharing options...
baaudio Posted May 26, 2010 Report Share Posted May 26, 2010 Well this is what my subs require... but i dont understand it :S the paper says "Port (in.) [dia. x length] 4 x 8.5" whats 4 x 8.5? how big is that? i know its inches but... yeah im so confused haha sorry for the nooby as questions XD ya thats for an aero port/pvc port Quote Team NWSPL baaudio Build Log 2001 GMC Sierra walkthrough 4 Mechman Elite 370s, 10 AGM batteries, 3 Crossfire XS v2 18s, Crossfire 8k Link to comment Share on other sites More sharing options...
Guest Posted May 26, 2010 Report Share Posted May 26, 2010 Well this is what my subs require... but i dont understand it :S the paper says "Port (in.) [dia. x length] 4 x 8.5" whats 4 x 8.5? how big is that? i know its inches but... yeah im so confused haha sorry for the nooby as questions XD what woofers first off. and 90% of manufacturer's box plans suck dick. just stick with the 12-16sqin (14-16 recommended) of port area. 4*8.5 = 34sqin so that number is useless until you say how big the box they say has to be. Quote Link to comment Share on other sites More sharing options...
MuzZa0nXTC Posted May 26, 2010 Author Report Share Posted May 26, 2010 that means you need your port to have a diamater of 4 inches, and a length of 8.5 inches. yes but i want a slot port so how do i work that out? ive been sitting here for so long trying to but i just cant do it lol im really good at all the boc building and fibreglassing but when it comes to the math i just cant get my head around it Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.