lightfoot Posted June 20, 2014 Report Share Posted June 20, 2014 I'm looking for some advice on a design for a single RE Audio 12 XXX in a 4th order bandpass. I have talked to one of the guys at RE and he suggested to make each chamber (ported & sealed) 5.5ft. with 30 sq." of port X 7.5" long. That would be tuned @ 35hz, and peak between 40-45hz.. This sounds completely ridiculous to me (WAY TO BIG). Here are the T/S parameters: Qes - 0.46 Qms - 3.29 Qts - 0.404 Fs - 21.00hz Vas - 74.0 liters Xmax - 54mm Efficiency-SPL 1W/1M - 83.76 dB SPL Sd - 480 cm^2 Re - 4.2 ohm Bl - 18.16 Oh yeah the recommended enclosures are: Sealed 1.1 and Ported 2.2 @ 34hz Any advice would be greatly appreciated. Currently I have it in a vented box that is 3.3 ft. it sounds good, i'm just looking at a bandpass design so i can port it through the rear deck. The vehicle is a '05 Nissan Altima and the power I'am running is a BAMF 5500 (I know shitty amp) Link to comment Share on other sites More sharing options...
DylanBunch Posted June 20, 2014 Report Share Posted June 20, 2014 Tune it more like 44 not 34 lol 34 is just dumb 2006 Ford Explorer 2 Team AA/Sundown 15s 6th order Ct Sounds 7k 4 PRV Mr500 8s Rockford p1000-2 Team Subsonic Lows Link to comment Share on other sites More sharing options...
lightfoot Posted June 21, 2014 Author Report Share Posted June 21, 2014 I'm not worried about the tuning, its the 5.5 ft per chamber that concerns me. Link to comment Share on other sites More sharing options...
CleanSierra Posted June 21, 2014 Report Share Posted June 21, 2014 I just did a bandpass for a Rockford Fosgate P2 and it's only got like 12MM of Xmax. I gave more port to that 10" than you're thinking of giving a sub with 54MM of Xmax. Unless you're considering at least doubling, or tripling port area, don't bother with a bandpass enclosure. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
CleanSierra Posted June 21, 2014 Report Share Posted June 21, 2014 And the guy you talked to, who suggested 30" of vent for a sub that has 54MM of Xmax, he doesn't sound like he knows his ass from a hole in the ground. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
lightfoot Posted June 21, 2014 Author Report Share Posted June 21, 2014 i agree 100%. I think we was in the sells dept. or something cause he said in tech support guy was busy doing a build. But anyways what do you think as far as enclosure design? Link to comment Share on other sites More sharing options...
CleanSierra Posted June 21, 2014 Report Share Posted June 21, 2014 Honestly, I'm not sure what I'd do for a design for that sub. It will be a big box though, and tuning will be a nightmare if you give proper port area. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
tacomaguy1 Posted June 21, 2014 Report Share Posted June 21, 2014 Idk but the new xxx's like big boxes Bigger than what's recommended on the site Team Flex Issues Link to comment Share on other sites More sharing options...
lightfoot Posted June 21, 2014 Author Report Share Posted June 21, 2014 can anyone plug the T/S perimeters in a box building program and see what it comes up with? Link to comment Share on other sites More sharing options...
Miguels Posted June 21, 2014 Report Share Posted June 21, 2014 is it the newer XXX? my brother has one and it dont like the abuse. they dont take a lot of power to get smelly. we tested a SMD sub in the same box same power and sounded a lot better louder and made more flex... if its the newer xxx do not over power it my logshttp://www.stevemead...-my-new-set-up/my blow through loghttp://www.stevemead...future-updates/ 96 ss http://www.stevemeadedesigns.com/board/topic/164094-96-impala-ss-build/ Link to comment Share on other sites More sharing options...
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