Greasemonkey2014 Posted December 2, 2013 Author Report Share Posted December 2, 2013 Will a single 4 inch port be enough? Link to comment Share on other sites More sharing options...
bcbrassard Posted December 2, 2013 Report Share Posted December 2, 2013 Single might be enough, but i believe 2 would put it into a high output box. not sure, someone else will have to chime in. Precission Ports are good to and they have a calculator website to help you with tuning lenths as well as numbers of ports your using. Link to comment Share on other sites More sharing options...
Greasemonkey2014 Posted December 2, 2013 Author Report Share Posted December 2, 2013 How would I make PVC ports? Link to comment Share on other sites More sharing options...
Joe X Posted December 2, 2013 Report Share Posted December 2, 2013 How would I make PVC ports? Lowe's sells raw PVC pipe, you just cut it to the desired length: http://www.lowes.com/pd_87669-1814-PVC+07300++0600_?productId=3135451&site=shopLocal&utm_campaign=bazaarvoice&utm_medium=SearchVoice&utm_source=RatingsAndReviews&utm_content=Default In the example I left you above 3 20" parts, you would just need to cut the above item in 3 identically sized parts. Link to comment Share on other sites More sharing options...
Greasemonkey2014 Posted December 2, 2013 Author Report Share Posted December 2, 2013 The link didn't work but don't i need to flare the ends? Link to comment Share on other sites More sharing options...
Krakin Posted December 2, 2013 Report Share Posted December 2, 2013 You can still flare PVC pipe. http://www.subwoofer-builder.com/flares-25mm.htm You cut out some MDF circles and then use bondo to make the radius. You then use a heat gun to heat the PVC then you can mold it down. Just make sure you sand it smooth. You can also do as CleanSierra and use a roundover bit on the MDF where the PVC will meet the MDF and then use body filler to smooth it out. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
Greasemonkey2014 Posted December 3, 2013 Author Report Share Posted December 3, 2013 That sounds much easier to do as clean Sierra did, but I should still have a flare on the inside right? How do you stick the port to the box? Link to comment Share on other sites More sharing options...
Joe X Posted December 3, 2013 Report Share Posted December 3, 2013 The link didn't work but don't i need to flare the ends? Here is a shot of the page: Yes some flaring is definitely beneficial (not strictly necessary in every case), there are many ways to do some flaring by heating up the PVC pipe to a mold, you can get flares separately or you can round a bit the external edge of the hole where you are placing the flare. Buying flares separately can be difficult since they must fit the pipe and not have an external diameter so large that won't fit properly in the side of the box. Link to comment Share on other sites More sharing options...
Greasemonkey2014 Posted December 3, 2013 Author Report Share Posted December 3, 2013 Schedule 40 would be too thick to flare wouldn't it? Link to comment Share on other sites More sharing options...
Krakin Posted December 3, 2013 Report Share Posted December 3, 2013 Yes you should flare on the inside as well, try to get it as close to the same as the outer flare. For speeds below 70% of the core limit of your port, the radius of the inside flare can be 15 - 20% smaller than that of the outside flare Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
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