Joe X Posted May 13, 2012 Report Share Posted May 13, 2012 Here is a suggestion: Enclosure Specifications: Fb = 36 Hz Vb = 7.8 ft^3 External Height = 20 in External Width = 37 in External Depth = 28 in Port Width = 18 in Port Height = 6 in Cut Sheet List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: 2 x Top & Bottom (3 parts) = 37 x 28 Left & Right Sides = 26 1/2 x 17 3/4 Front & Back = 37 x 17 3/4 L Port Internal Assembly Parts: Front to Back = 16 1/4 x 19 1/2 Port Left Side Assembly: 16 1/4 x 6 Port Right Side Assembly: 16 1/4 x 6 Don't recommend 32Hz tuning for these subs. That's Awesome! I'm about to pick up a circular saw and jigsaw, and I already have 2 sheets of MDF, screws, drills, glue, and loctite to seal it up along with fiberglass resin! I'm excited to get this done and in my car Going to try and get it done this weekend. Ok so here's the port assembly sketchup : And here is a plot comparing performance of 32 and 36Hz tuning: 32Hz is green, you certainly get a bit louder on 36Hz but the tuning can be lowered if needed. Link to comment Share on other sites More sharing options...
Joe X Posted May 13, 2012 Report Share Posted May 13, 2012 And yes aero ports remain an option but it will be cheaper and faster just cutting the three pieces of wood suggested. Link to comment Share on other sites More sharing options...
Purplehaze Posted May 13, 2012 Report Share Posted May 13, 2012 And here is a plot comparing performance of 32 and 36Hz tuning: 32Hz is green, you certainly get a bit louder on 36Hz but the tuning can be lowered if needed. Yes you will be a little louder tuning @36hz. But what are your goals? Are you wanting to be louder on the lows? Or just meter good? I recommend the 32hz tuning. It will sound deeper and you will feel the low notes better. The box I did for 3 12" L5's was tuned @33hz and it was by far the best sounding my Kickers EVER were. And that was on ALL types of music, since I am also a metal head as well as a bass head... Kickin' Cruiser Seller Feedback Stage 3 Dash, Door Panels,4th Order wall 4 - 15'son a DC 5.0K 2 DC 5.0K'sSolo X 15 (v.2) Sub Build Link to comment Share on other sites More sharing options...
AMI CUSTOMS Posted May 13, 2012 Report Share Posted May 13, 2012 IMO considering I did 151s with 2 L7 15s off 2200 watts clamped, I would build the box bigger then 8 cubes net, more like 10-12 cubes net, they will hit much lower and produce a much higher SPL with more air space you have to treat these like 18 due to the obvious fact they are square. TEAM SOUNDQUBED -- TEAM SOUTH TEAM S.O.B. - Founder & Captain 3x Streetbeat World Record Holder 2017 MWSPL 1st place Mayhem & 4th Xtreme 4 2016 MWSPL 1st place Mayhem/2nd Adv 4/2nd Xtreme 4 2015 MWSPL 2nd place Mayhem & 4th Xtreme 4 2014 USACI 2nd place Streetbeat 5 - 162.6 db 2014 MWSPL 2nd place Xtreme 4 - 144.9 db 2013 USACI 1st place Streetbeat 4 - 161.9 db 2013 USACI 1st place Street Q+ - 162.8 db 2013 MWSPL 3rd Kaos2 & 4th Xtreme 4 2011 USACI 2nd place MOD 1001-2k - 160.0 db 2011 MWSPL 4th place: Adv3 - 157.8 db, Kaos2 - 150s db, Xtreme4 - 140s db 2010 ARSPL 1st place 501-750 - 160.3 db Arkansas loudest Best score to date 164.4 db - Termlab Outlaw Streetbeat 4 - 161.9 db Streetbeat 5 - 162.6 db MWSPL on Dash Legal door open (Music) - 162.5 db Sealed on dash Legal (Music) - 161.1 db - Termlab THE BLACK NASTY CURRENT BUILD & FAB The Black Nasty (6) 15 Rebuild Log 2012 (4) 15 Walled Sierra Build Log Evo X build log Facebook page The Black Nasty Link to comment Share on other sites More sharing options...
john253a Posted May 14, 2012 Report Share Posted May 14, 2012 If you think you'll notic 2db of gain @ -3db on 31hz then tune to 32 but some how I don't think so, And cabin gain will help level it out If you speek to Barry at kicker he'll tell you 38-45hz is the best tune and that there boxes are 55-60hz Link to comment Share on other sites More sharing options...
Kranny Posted May 14, 2012 Report Share Posted May 14, 2012 those graphs are completely fucking irrelevant. i dont know why people obsess over them. that just shows the frequency response of the box sitting on your driveway with a mic a foot from it. that graph changes COMPLETELY once you put the box in your car. Link to comment Share on other sites More sharing options...
RickyFriery97 Posted May 14, 2012 Report Share Posted May 14, 2012 IMO considering I did 151s with 2 L7 15s off 2200 watts clamped, I would build the box bigger then 8 cubes net, more like 10-12 cubes net, they will hit much lower and produce a much higher SPL with more air space you have to treat these like 18 due to the obvious fact they are square. This^ L7s love their airspace I had 4 L7 15"s in a 20+ cube box 2014 Chevy Silverado Crewcab 1994 Chevy Full Size blazer Link to comment Share on other sites More sharing options...
Kranny Posted May 14, 2012 Report Share Posted May 14, 2012 another reason why people who haven't used the woofers shouldn't make free box designs. Link to comment Share on other sites More sharing options...
dblovah51 Posted May 14, 2012 Report Share Posted May 14, 2012 8 cubes net with 100squ of port tuned to 33-35 usually does it for me with L7 usin under 2k watts 2004 trailblazer 4 FI BTL 18s (2) DC 10.0k xs power d3100s mechman 270 158.2 @41 Link to comment Share on other sites More sharing options...
CleanSierra Posted May 14, 2012 Report Share Posted May 14, 2012 another reason why people who haven't used the woofers shouldn't make free box designs. X2 on this shit. Geezus!!! Or have ANY experience with the vehicle in question either.... 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...
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