qwilkins Posted January 2, 2014 Report Share Posted January 2, 2014 Im building a new box,but this is my first time actually trying to build a ported box i need some feedback on the design.The design via google sketchup: https://www.dropbox.com/s/n6vqtito0gxoi0j/36Hz.skp If i did it right the box should be tuned to 36 Hz and have 7.844 ft^3. thanks in advance. forgot to mention im using 2 l7 15's Link to comment Share on other sites More sharing options...
hdorre Posted January 2, 2014 Report Share Posted January 2, 2014 Why not use 1 port? On 5/8/2011 at 7:38 PM, Kranny said: On 5/8/2011 at 7:35 PM, 'Maxim' said: It hurts me inside when I read stuff like this and remember you're 15 LMFAO so true Mitsubishi 3000GT (Old Build) Headunit: Pioneer 80PRS Frontstage: (2) McLaren Audio MLT-2 Tweeters & (4) PRV Audio MR Series Neo 6.5" Mids Substage: 4 15" Hybrid Subs - Tantric Motors & Sundown Softies Amps: Banda 2.4D Amp (Tweets), American Bass VFL 350.4 (Mids), and (2) Ampere 3800s Electrical :Singer 260A Alt & JY Power Lithium 2005 Chevy Colorado Ext Cab Headunit: Pioneer 80PRS Frontstage: 4 PRV 700Ti Tweets & 6 10" Delta Mids on 3000wrms Substage: 6 Fi BTL 18s in a 4th Order Walkthrough on 3 Wolfram 4500s Electrical: Singer "390" and JY Power My Official Feedback Thread Link to comment Share on other sites More sharing options...
qwilkins Posted January 2, 2014 Author Report Share Posted January 2, 2014 Why not use 1 port? I wanted to have the individually ported to see the difference between common chambered and separated ported boxes Link to comment Share on other sites More sharing options...
Joe X Posted January 2, 2014 Report Share Posted January 2, 2014 Your calculations look wrong. If I got your dimensions right 16 3/4 x 45 1/2 x 20 3/4" you have about 3 cubes of net airspace for each sub which is too low for them, it's at least more like 4 cubes net each what will work nice with those. Link to comment Share on other sites More sharing options...
qwilkins Posted January 2, 2014 Author Report Share Posted January 2, 2014 Your calculations look wrong. If I got your dimensions right 16 3/4 x 45 1/2 x 20 3/4" you have about 3 cubes of net airspace for each sub which is too low for them, it's at least more like 4 cubes net each what will work nice with those. Ok so, if i add 5 more inches to the width making it 50.5 should have about 5, but then with the space the wood is taking up i should have a little of 4 left over right? Link to comment Share on other sites More sharing options...
Joe X Posted January 2, 2014 Report Share Posted January 2, 2014 Going 50 1/2W, would up it to about 3.4 cubes net per sub from nearly 3 cubes, still a long way to go. Link to comment Share on other sites More sharing options...
qwilkins Posted January 2, 2014 Author Report Share Posted January 2, 2014 Going 50 1/2W, would up it to about 3.4 cubes net per sub from nearly 3 cubes, still a long way to go. Can only go up to 55 in length 20 dept 17 height. That's the max i can fit in my trunk. so 16.75 X 54 X 19.25 wouldn't work either? sorry i forgot that you have to use a different formula to calculate air space for ported boxes . Link to comment Share on other sites More sharing options...
Joe X Posted January 3, 2014 Report Share Posted January 3, 2014 17x54x20.75 would figure to 8 cubes net @ 36Hz, to keep tuning to 36Hz port area would need to be kind of low, it will work ok but may not be very efficient if you go all out on power. Link to comment Share on other sites More sharing options...
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