Michael Campbell Posted July 14, 2012 Report Share Posted July 14, 2012 I have two fi btl n3's 12inch subwoofers with 3500 watts per subwoofer or less if need be. Each subwoofer will have 1.5 cubic feet for volume enclosure so 2 12s 3.0 cubic feet -- not including the size the port area takes up.will add that up later. What is the maximum amount of port area i can have without damaging the subwoofers for daily use. I know alot of people say the rule of thumb is 15-20 per cubic foot. But i wanna know whats the biggest port area i can run safely. My goal is to produce more air flow for hair tricks and pressure in vehichle. And this is a daily driver. Link to comment Share on other sites More sharing options...
wizart383 Posted July 14, 2012 Report Share Posted July 14, 2012 I usually use between 12-16 for slot ports and 9-12 for round ports. You need to tune low for what your trying to do. Fi recommends 1.5 - 2.5 per woofer after port, woofer and bracing displacement. Link to comment Share on other sites More sharing options...
fox_racin4 Posted July 14, 2012 Report Share Posted July 14, 2012 Lots of port area doesnt mean hair tricks. 1998 gmc extd cab 12 crossfire C710s 4 SAZ-4500s 3 Singer 400A altsbuncha mids/highs Team Asshole Link to comment Share on other sites More sharing options...
Ddub847 Posted July 14, 2012 Report Share Posted July 14, 2012 more port doesnt mean louder Link to comment Share on other sites More sharing options...
Tim Lam Posted July 14, 2012 Report Share Posted July 14, 2012 more port doesnt mean louder im going to have to disagree Link to comment Share on other sites More sharing options...
n8ball2013 Posted July 14, 2012 Report Share Posted July 14, 2012 more port doesnt mean louder im going to have to disagree And again here you are with more lack of knowledge but trying to sound like a pro. There is a point where adding port has diminishing returns. That's why split is all about testing and rebuilding THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
Michael Campbell Posted July 14, 2012 Author Report Share Posted July 14, 2012 how do the people come up with the rule of 15-20 per say. Do they test it in a vehichle? in a laboratory. a computer program. In fact that alot of vehichles are different sizes.? Which takes more or less volume to pressurize. Your not going to have the same result in every car if you follow the rule of thumb? right? So whos to say i can't have a big port in a small box in a small car and perform well?. Link to comment Share on other sites More sharing options...
Ddub847 Posted July 14, 2012 Report Share Posted July 14, 2012 more port doesnt mean louder im going to have to disagree Hey y dont u sit back shut your mouth and learn a little before speaking kid Link to comment Share on other sites More sharing options...
Michael Campbell Posted July 14, 2012 Author Report Share Posted July 14, 2012 how does the theory of this work? Link to comment Share on other sites More sharing options...
TeamHT Posted July 14, 2012 Report Share Posted July 14, 2012 more port doesnt mean louder im going to have to disagree And I'm going to have to say you really dont know what you're talking about. You're new, but every post seems worse than the previous. Feel free to educate some of us Tell me...does this smell like chloroform to you? Link to comment Share on other sites More sharing options...
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