broncosean Posted March 13, 2015 Report Share Posted March 13, 2015 Hey guys, so I've been in car audio for a few years now and have gotten a taste of a little bit of everything, I've made a few sealed, ported and a fourth order but all were built to manufactures specs. I am more curious about designing my own boxes as far as how much port area to use with what drivers, trading off more port area for high tuning, etc. The main thing I should say is I'm curious the role port area plays other than just using the minimum amount to avoid port noise. For example I'm going to build a box for a friend and he has quite a bit of room to work with behind the seat of his truck and I'm thinking of running a pair of tens and wanna know how much port area is too much, what do I gain by running more port area and low tuning etc. Any help is appreciated guys 1994 Ford bronco Infininti kappa 4 channel driving a pair of reference 6.5s and a pair of 6x8 kappas downfiring console w/ a pair of image dynamic 8s on a memphis 250.1 1999 Honda Civic Si front doors- image dynamics ctx 6" coaxial with ID tweets Back deck- Image Dynamics ctx 6x9" coaxials Bass- PSI platform 1 12" in a 4th order tuned to 39hz Amps- CT sounds 60.4 highs and mids, Ampere Audio 1k bass Power- Big 3 upgrade, second juicebox 50ah battery, sky high 1/0, skyhigh battery terminals Link to comment Share on other sites More sharing options...
Jeff4661 Posted March 13, 2015 Report Share Posted March 13, 2015 Well on port area as a general rule port area should be calculated off of xmax for a given tuning frequency.. A good way to avoid port noise (at least In my experience) is to design your box in winisd Pro and keep port velocities right around 20 m/s Current build 05 Yukon SLT http://www.stevemeadedesigns.com/board/topic/195350-jeffs-05-yukong-wall-build/ Link to comment Share on other sites More sharing options...
Jeff4661 Posted March 13, 2015 Report Share Posted March 13, 2015 Here is a good "starter" for calculating port area vs xmax at given tuning frequency... But it works fairly well http://www.carstereo.com/help/Articles.cfm?id=31 Current build 05 Yukon SLT http://www.stevemeadedesigns.com/board/topic/195350-jeffs-05-yukong-wall-build/ Link to comment Share on other sites More sharing options...
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