joemon Posted January 20, 2012 Report Share Posted January 20, 2012 im looking to make an enclosure for my 240sx (s13) hatchback. what i have to work with is: amp - hifonics 2608d (2600rms @1ohm) subs - pair of 12in dc audio lvl4s d1 LV4 12" Mounting Depth 6.75" Mounting Hole Diameter 11" Motor Width 7.75" Weight 32.5lbs VC Diameter 3" Displacement .18³ ft Magnet Weight 28.5lbs Power Handling RMS/Peak 1000/2000 Impedance (Ohm) d1 or d2 Sd 494.00 cm² Vas 66.60 L Cms 1.95e-04 m/N Mms 173.08 g Fs 27.4 Hz Bl 16.15 Re 3.60 ohm Le 4.02 mH Qms 5.13 Qes 0.42 Qts 0.39 Xmax 23.5 mm Sensitivity 87.0 dB Suggested Sealed 1³ ft Suggested Ported 1.5³ ft im wanting to do a ported box and have it tuned low to get the 240sx flexing but do not want to do a wall. i want to be able to remove the box when needed. and to keep the sway bars (X-bars) installed. i was thinking if the port needs to be long i can have to port go in between the bar and the trunk floor. my back seats will be removed and have my batterys and amps there. so the spare battery casing in the back will be moved. and the spare tire compartment, would that just be better to make a false floor and not even try to use that space? heres pix of what im working with Quote stevemeadedesigns.com/board/topic/105505-silvia-first-time-build-kenwood/ Link to comment Share on other sites More sharing options...
joemon Posted January 22, 2012 Author Report Share Posted January 22, 2012 i need suggestions on whats the best application i can use for my situation here. im wanting the do port design what should the box be tuned to? should i do circle port or square port? and at what hz? this with be my first box build and would just like to do it right Quote stevemeadedesigns.com/board/topic/105505-silvia-first-time-build-kenwood/ Link to comment Share on other sites More sharing options...
alaskanzx5 Posted January 22, 2012 Report Share Posted January 22, 2012 not sure with those subs but most 12s need about 2 cuft of airspace after port bracing and sup displacement. then with a ported box i know most people seem to tune around 32-35hz im tunning around 35-40hz. so in the end you will need a box with atleast 4cuft net of airspace and have it tuned to where you like it with about i would say 16 sq in per foot. a box at about 15" high 32.5 wide and 25.5 deep would give 4.06cuft net for the subs slot ported tuned to 37hz with 15 sq in of port per foot, the port would be 2.5" wide with a total lenght of 22". would have a double baffle and you would have .06cuft that you could use up for bracing and 45s in the corners. should sound nice in a box like this but im sure someone will chime in with a more knowlege on those subs Quote t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz. Link to comment Share on other sites More sharing options...
bumpinTL364 Posted January 22, 2012 Report Share Posted January 22, 2012 could build a housing for batts or amps in the spare tire space and make a nice beauty panel to show them off... Quote masterbation is free, and even saves you money.sorry but someone had to say itsorry, Jimmy...beat you to it (no pun intended) LOLDON'T get a wife. Best advice I never got, and now it's too late My build: 12" DCON in a dorm room. New/current build: 8" woofer, custom amplifier block, fiberglassed speaker pods Link to comment Share on other sites More sharing options...
odsound Posted January 22, 2012 Report Share Posted January 22, 2012 we just took my friend lizzie's 240 to a usac show did a 143.1 db at 59hz lol they sure do like to peek high i can post some pics of her enclosure if you would like.....and nice tail lights Quote vehicle-02 toyota celicawoofers-groundshaker g-s1 10" woofersamp-SUNDOWNAUDIO SAZ 3500battery-1 C&D battery Link to comment Share on other sites More sharing options...
412 CVX Posted January 22, 2012 Report Share Posted January 22, 2012 (edited) we just took my friend lizzie's 240 to a usac show did a 143.1 db at 59hz lol they sure do like to peek high i can post some pics of her enclosure if you would like.....and nice tail lights sorry to post dump, but i love the paint job on that box!! OP: what's the purpose of that crossbar type thing in the hatch? Edited January 22, 2012 by 412 CVX Quote Just say no to Ground Pounder Customs. My temp system build log More box buildssome cars do over 170db with one sub, so clearly my two 12"s can do that in my car, with my knowledge too! look out bitches! I'm with captain stupid. Link to comment Share on other sites More sharing options...
joemon Posted January 22, 2012 Author Report Share Posted January 22, 2012 we just took my friend lizzie's 240 to a usac show did a 143.1 db at 59hz lol they sure do like to peek high i can post some pics of her enclosure if you would like.....and nice tail lights ya could you post the pix here im just trying to see what i can do with this and ya im glad the "kouki" lights came with my car when i bout it lol Quote stevemeadedesigns.com/board/topic/105505-silvia-first-time-build-kenwood/ Link to comment Share on other sites More sharing options...
joemon Posted January 22, 2012 Author Report Share Posted January 22, 2012 OP: what's the purpose of that crossbar type thing in the hatch? its a sway bar to prevent body roll (keep the body from swaying during drifting) Quote stevemeadedesigns.com/board/topic/105505-silvia-first-time-build-kenwood/ Link to comment Share on other sites More sharing options...
joemon Posted January 22, 2012 Author Report Share Posted January 22, 2012 heres what i got so far does anything look wrong here? Quote stevemeadedesigns.com/board/topic/105505-silvia-first-time-build-kenwood/ Link to comment Share on other sites More sharing options...
Joe X Posted January 22, 2012 Report Share Posted January 22, 2012 (edited) Port area is too low. dual 4.5" aero ports with length of 18.8 in would give acceptable results, the box would spec as follows: Fb = 32,341 Hz Vb = 3,707 ft^3 Also I would do a dual layer baffle and some vertical crossbracing Edited January 22, 2012 by Joe X Quote Link to comment Share on other sites More sharing options...
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