bcpballer64 Posted January 8, 2010 Report Share Posted January 8, 2010 (edited) Ok so i have my box finished and installed but my tuning is way way too high. it is tuned at 41 hz. I know that to get it down to 36 hz (where i want it) i need a 6" long 3" diameter port tube. I cant find them anywhere i can only find them in like 4" or 4.5" lengths. My question: can i use PVC pipe for a port tube? I have access to some 3" pvc pipe and could easily get some of it. Edited January 8, 2010 by bcpballer64 Quote "The strongest reason for people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." -- (Thomas Jefferson) Link to comment Share on other sites More sharing options...
-Hobby- Posted January 8, 2010 Report Share Posted January 8, 2010 Dont use 3" pvc for your port unless you use multiple ports. I used the Alpine spec for a 3" port for my 10" Type R and it made a hell of a lot of port noise. I changed it to a 4" round pvc port and fixed the problem. How many cubes is your box gross, internal dimensions and is this for the 2 subs in your sig? Quote Link to comment Share on other sites More sharing options...
bcpballer64 Posted January 8, 2010 Author Report Share Posted January 8, 2010 Dont use 3" pvc for your port unless you use multiple ports. I used the Alpine spec for a 3" port for my 10" Type R and it made a hell of a lot of port noise. I changed it to a 4" round pvc port and fixed the problem. How many cubes is your box gross, internal dimensions and is this for the 2 subs in your sig? I have a box that i made for my physics project. http://www.stevemeadedesigns.com/board/ind...showtopic=64923 I have 3 inch tubes in either side right now but i want to lower the tuning and i know that i need a 6" long tube to get it there. I dont have any port noise. It is a bandpass enclosure and the tube is in the front chamber. The ported chamber is 1.8 cubes and the sealed chamber is 1.5 cubes. Each subwoofer has its own chamber. So you dont think that using straight up like plumbing PVC pipe would work? Quote "The strongest reason for people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." -- (Thomas Jefferson) Link to comment Share on other sites More sharing options...
Andrew2944r Posted January 8, 2010 Report Share Posted January 8, 2010 All I used in the 90's was PVC ports, works great just round off the ends with sand paper and a router for the face. Quote Team Ampere Audio Link to comment Share on other sites More sharing options...
bcpballer64 Posted January 8, 2010 Author Report Share Posted January 8, 2010 All I used in the 90's was PVC ports, works great just round off the ends with sand paper and a router for the face. Ok, cool. Quote "The strongest reason for people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." -- (Thomas Jefferson) Link to comment Share on other sites More sharing options...
enemyofsilence Posted January 8, 2010 Report Share Posted January 8, 2010 i have 5 pvc tubes in my box and sound great. Quote Team Bass-Hz Link to comment Share on other sites More sharing options...
bcpballer64 Posted January 8, 2010 Author Report Share Posted January 8, 2010 i have 5 pvc tubes in my box and sound great. Thats what i am looking for. Thank you very much. Quote "The strongest reason for people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." -- (Thomas Jefferson) Link to comment Share on other sites More sharing options...
bcpballer64 Posted January 8, 2010 Author Report Share Posted January 8, 2010 Thanks for the advice guys. Went out back and found this little guy and cut me some port tubes. Quote "The strongest reason for people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." -- (Thomas Jefferson) Link to comment Share on other sites More sharing options...
bcpballer64 Posted January 8, 2010 Author Report Share Posted January 8, 2010 ~31-33 hz should sound a hella lot better than 43 hz tuned right? it is a daily and it is a 4th order bandpass. Quote "The strongest reason for people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." -- (Thomas Jefferson) Link to comment Share on other sites More sharing options...
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