Nasty1 Posted May 19, 2012 Report Share Posted May 19, 2012 I'm going to gut my box and turn it in to a 4th order wall for a xl18 m1. Im thinking 3 cuft. sealed and 15cuft ported @ 43 hz off a sundown 3500. The reason I'm doing this is for a wider musical bandwith and still play stupid low. What you guys think ? Any advice would be appreciated . Quote 2 DC Audio lvl 4 xl 18s D .7s walled off @ 30 hz 19 cubes net 245sq in of port Sundown 3500 @ .7 Ohm Sundown 100.4 Rockford Fosgat Power Series 5.25 Dash 6.5 Kicks 8 Coaxils Doors 250 mechicman alt 1 red top under the hood 2 yellow tops in back big 3 with 1/0 knukonceptz wire 3 runs of +/- 1/0 knukonceptz wire IT LBS Link to comment Share on other sites More sharing options...
xterraboy03 Posted May 19, 2012 Report Share Posted May 19, 2012 15 cubic feet ported maybe a little large... 1 Quote 03' NISSAN XTERRA (1) AQ3500d (1) AQ4x90 (1) Audio Control Line Driver (4) DC LVL 4 15's Cresendo Mids and Highs 100' of 0/guage Big Three Mechman 270a Charging @ 16.5v (6) XS D1400's Highest Termlab Score 149.9 at the kick & 166.1 in the Port/ on stock electrical and 1 DC XL M1 Updated JUNE 2012*****MY BUILD LOG USACI REGION 6 POINTS LEADER 2011 USACI KANSAS RECORD HOLDER 2011 Team DC http://www.dcsoundlab.com/ Link to comment Share on other sites More sharing options...
Nasty1 Posted May 19, 2012 Author Report Share Posted May 19, 2012 I'v been reading the bigger the ratio the better ??? Quote 2 DC Audio lvl 4 xl 18s D .7s walled off @ 30 hz 19 cubes net 245sq in of port Sundown 3500 @ .7 Ohm Sundown 100.4 Rockford Fosgat Power Series 5.25 Dash 6.5 Kicks 8 Coaxils Doors 250 mechicman alt 1 red top under the hood 2 yellow tops in back big 3 with 1/0 knukonceptz wire 3 runs of +/- 1/0 knukonceptz wire IT LBS Link to comment Share on other sites More sharing options...
sprkn_ranger Posted May 19, 2012 Report Share Posted May 19, 2012 Have you seen this thread? http://www.stevemeadedesigns.com/board/topic/126478-basics-of-a-4th-order-bandpass-enclosure/ Might get you pointed in the right direction. Quote Check out my build log! 4 Havocs in a blowthrough http://www.stevemeadedesigns.com/board/topic/187506-sprkn-rangers-blowthrough-build/ Link to comment Share on other sites More sharing options...
Nasty1 Posted May 19, 2012 Author Report Share Posted May 19, 2012 No sir ill check it out Thankz Quote 2 DC Audio lvl 4 xl 18s D .7s walled off @ 30 hz 19 cubes net 245sq in of port Sundown 3500 @ .7 Ohm Sundown 100.4 Rockford Fosgat Power Series 5.25 Dash 6.5 Kicks 8 Coaxils Doors 250 mechicman alt 1 red top under the hood 2 yellow tops in back big 3 with 1/0 knukonceptz wire 3 runs of +/- 1/0 knukonceptz wire IT LBS Link to comment Share on other sites More sharing options...
xterraboy03 Posted May 19, 2012 Report Share Posted May 19, 2012 My 4th order I buil was 2.5 sealed and about 4.8 ported, I would definitely go with 2:1 ratio. I think it would best. So If u wanna go 3 sealed run 6 ported! Do it you will like it if you build it they will come! Quote 03' NISSAN XTERRA (1) AQ3500d (1) AQ4x90 (1) Audio Control Line Driver (4) DC LVL 4 15's Cresendo Mids and Highs 100' of 0/guage Big Three Mechman 270a Charging @ 16.5v (6) XS D1400's Highest Termlab Score 149.9 at the kick & 166.1 in the Port/ on stock electrical and 1 DC XL M1 Updated JUNE 2012*****MY BUILD LOG USACI REGION 6 POINTS LEADER 2011 USACI KANSAS RECORD HOLDER 2011 Team DC http://www.dcsoundlab.com/ Link to comment Share on other sites More sharing options...
sprkn_ranger Posted May 19, 2012 Report Share Posted May 19, 2012 No sir ill check it out Thankz No prob Quote Check out my build log! 4 Havocs in a blowthrough http://www.stevemeadedesigns.com/board/topic/187506-sprkn-rangers-blowthrough-build/ Link to comment Share on other sites More sharing options...
Nasty1 Posted May 19, 2012 Author Report Share Posted May 19, 2012 Ok i got one for ya. Lets say i do a 2:1 ratio 3cuft sealed and 6 ported . With the ported section do i do 6 cuft total or 6cuft + port ??? Quote 2 DC Audio lvl 4 xl 18s D .7s walled off @ 30 hz 19 cubes net 245sq in of port Sundown 3500 @ .7 Ohm Sundown 100.4 Rockford Fosgat Power Series 5.25 Dash 6.5 Kicks 8 Coaxils Doors 250 mechicman alt 1 red top under the hood 2 yellow tops in back big 3 with 1/0 knukonceptz wire 3 runs of +/- 1/0 knukonceptz wire IT LBS Link to comment Share on other sites More sharing options...
sprkn_ranger Posted May 19, 2012 Report Share Posted May 19, 2012 Ok i got one for ya. Lets say i do a 2:1 ratio 3cuft sealed and 6 ported . With the ported section do i do 6 cuft total or 6cuft + port ??? I believe it is after displacements...someone will correct me if I'm wrong. Quote Check out my build log! 4 Havocs in a blowthrough http://www.stevemeadedesigns.com/board/topic/187506-sprkn-rangers-blowthrough-build/ Link to comment Share on other sites More sharing options...
xterraboy03 Posted May 19, 2012 Report Share Posted May 19, 2012 After displacement! Quote 03' NISSAN XTERRA (1) AQ3500d (1) AQ4x90 (1) Audio Control Line Driver (4) DC LVL 4 15's Cresendo Mids and Highs 100' of 0/guage Big Three Mechman 270a Charging @ 16.5v (6) XS D1400's Highest Termlab Score 149.9 at the kick & 166.1 in the Port/ on stock electrical and 1 DC XL M1 Updated JUNE 2012*****MY BUILD LOG USACI REGION 6 POINTS LEADER 2011 USACI KANSAS RECORD HOLDER 2011 Team DC http://www.dcsoundlab.com/ Link to comment Share on other sites More sharing options...
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