Bakerman Posted May 29, 2011 Report Share Posted May 29, 2011 So, I'm not quite understanding this concept. I know there is a 1" variable/flare when using ports with flares. But I'm unsure if you take away 1"/flare or add 1"/flare to the actual length. I guess what I mean is if I have a port that has a flare on each end, and the physical length from top to bottom of the whole setup is 10", is the air actually seeing 12" of port, or 8" of port? Quote Link to comment Share on other sites More sharing options...
AI James Posted May 29, 2011 Report Share Posted May 29, 2011 its seeing 10 inches of port...your measuring down the middle regardless Quote Link to comment Share on other sites More sharing options...
meade916 Posted May 29, 2011 Report Share Posted May 29, 2011 i ONLY count the straight tube part of the flared port. Quote All SMD products + MORE available at my store here! https://wccaraudio.com/ Subscribe to My Youtube Channel! Over 1,000,000 subscribers strong! Turn on your notifications! http://www.youtube.com/meade916 Follow My Instagram! Daily live feeds from the shop, exclusive content way before it hits my Youtube channel...and little squares with photo's in them http://www.instagram.com/meade916 The Official SMD Facebook fan Page https://www.facebook.com/SteveMeadeDesigns/ Follow my Tweet (Twitter) http://www.Twitter.com/meade916 Link to comment Share on other sites More sharing options...
AI James Posted May 29, 2011 Report Share Posted May 29, 2011 see 2 different ways already Quote Link to comment Share on other sites More sharing options...
Bakerman Posted May 29, 2011 Author Report Share Posted May 29, 2011 Yeah...its hard to get a definite answer on this stuff...thanks guys. Quote Link to comment Share on other sites More sharing options...
Bakerman Posted May 29, 2011 Author Report Share Posted May 29, 2011 i ONLY count the straight tube part of the flared port. I thought you had to do some odd calculations for that squaro-port you did...or would that be different than a normal aeroport. Quote Link to comment Share on other sites More sharing options...
bkolfo4 Posted May 29, 2011 Report Share Posted May 29, 2011 You count the entire length of the tube with the flares, but you add one inch to the calculated length. So if the calculations call for 14", you use 15". It is call end correction. There is a formula for it based on the type of end. For standard aeros, it just happens to work out really close to one inch. Quote Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
Bakerman Posted May 29, 2011 Author Report Share Posted May 29, 2011 (edited) So whatever the length of the port is, the air is actually seeing 1" less. I was hoping it was the other way around. I did see some ports that the flares are dimpled like the face of a golfball...they claim that it slows the moving air down enough that you don't have to compensate that extra inch. EDIT- messed up the HTML Code for the quote Edited May 29, 2011 by BakermanINC Quote Link to comment Share on other sites More sharing options...
Robert8252 Posted May 29, 2011 Report Share Posted May 29, 2011 (edited) Unless you have a stupid small port where 1 inch can be a full frequency or more you won't necessarily notice a difference worrying about it. And tuning is all about port area. It doesn't matter if its a 8" aero or a 10"x5" slot port. Length is going to be about the same for a certain frequency in the same box. Edited May 29, 2011 by Robert8252 Quote 2013 F150 Crew Cab Old Build Log Feedback 2013 F150 Equipment - Some Awesome Stereo Sound Making Stuff Link to comment Share on other sites More sharing options...
mlstrass Posted May 29, 2011 Report Share Posted May 29, 2011 you use 1/2 the length of the radius when calculating the length of an aero Quote Link to comment Share on other sites More sharing options...
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