77-AUDIO Posted January 14, 2008 Report Share Posted January 14, 2008 I have a set of Robot underground subs (dimond subs dont ask) but they require a port thats 4" dia x 18" L. could i but the port into 3 6" lengths and acheive the same thing? Quote PPI dbl dinDC Level 31.77cubes net tuned to 33htz.DC audio 2.0kCT Pro Audio 8" in front, 6.5 in rear Link to comment Share on other sites More sharing options...
Derrick824 Posted January 14, 2008 Report Share Posted January 14, 2008 I have a set of Robot underground subs (dimond subs dont ask) but they require a port thats 4" dia x 18" L.could i but the port into 3 6" lengths and acheive the same thing? No. Quote Link to comment Share on other sites More sharing options...
77-AUDIO Posted January 14, 2008 Author Report Share Posted January 14, 2008 why will that not work. i have an idea but want to be sure. Quote PPI dbl dinDC Level 31.77cubes net tuned to 33htz.DC audio 2.0kCT Pro Audio 8" in front, 6.5 in rear Link to comment Share on other sites More sharing options...
andym85 Posted January 14, 2008 Report Share Posted January 14, 2008 (edited) b/c u are tripling the port area... example with some completely made up specs that were already in the calc i use.... with a box that is 7.57cubes gross: (1) 4"port 18"long= 12.57sq" of port area tuned to about 15hz (3) 4"ports 6"long= 37.7sq" of port area tuned to about 40hz to get the same tuning of 15hz with 3 ports, each would have to be about 80"long...LOL...that aint gonna happen Edited January 14, 2008 by amatt85 Quote i likes me some audio stuff... Link to comment Share on other sites More sharing options...
77-AUDIO Posted January 14, 2008 Author Report Share Posted January 14, 2008 ok thats sim to what i thought. i figured that the opening was goning to be to large. Now can i put the port on the side of the box. the box is designed to be a downfire with the bottom being 11.75" back is 8.25" and the top is 7.75" width is 49" these are the inside dims. my airspace is just around 2.3 when factoring in the subs displacement. could i put the ports on the side of the box. reason i am asking is i always heard that it was better to have the ports on the same side as the subs. if not what would be the dims for a vent. i am also running 2 subs in one box no divider. i want this to hit hard and low please help. remember the required port is 4"dia X 18" L. any input is welcome i can build the heck out of sealed boxes but ported and vented are my problem.... Quote PPI dbl dinDC Level 31.77cubes net tuned to 33htz.DC audio 2.0kCT Pro Audio 8" in front, 6.5 in rear Link to comment Share on other sites More sharing options...
andym85 Posted January 14, 2008 Report Share Posted January 14, 2008 you can port to the side if u wish Quote i likes me some audio stuff... Link to comment Share on other sites More sharing options...
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