slot port build

[mat3833 10+ year member]

ok, so im selling my JL to a friend and he wants a box made for it. i have the skills to make a box(ex-carpenter/Framer) but i dont have the skills to design one. he doesnt want anything special, just a slot port box tuned to about 30Hz. he wants an upfire configuration, with a max height of 12 inches and max depth of 15 inches. the rest doesnt mater. can you guys help me out??

i dont even kno where to start making measurements or subtracting what from what....

Matt

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[mat3833 10+ year member]

also, JL lists the space requirements at 1.125 cubic feet when tuned to 30Hz

Matt

 

[cshaw 10+ year member]

look in the build section to get some ideas of how it goes. maybe just use the re calculator. http://reaudio.com/speaker_box/LPort_Box_Calc.html

 

[mat3833 10+ year member]

re-calculater?? lol, ill google it.

Matt

 

[406er 10+ year member]

hey posted the link dude, just click it

 

[mat3833 10+ year member]

ok, how important is it to keep within the space requirements and tuning specified by JL? i cant seem to get a combination of LxWxH that works to get the space right and also allows me to tune it to 30Hz as JL suggests without going to a .5 inch port width....

Matt

 

[DonH 5,000+ posts]

ok so a box thats ~1.25ft^3 your gona want ~ 20"^2 of port area... lmk if you need some help with a design bro... also check the free design thread... calculations somewhat off but not to bad. also look in to aero ports //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif one 4" will be enough

 

[mat3833 10+ year member]

ummmm, aero port?? no clue what that is, unless u mean round port. and if thats the case, no go. he wants it a slot port. im having trouble with the whole upfire deal. idk, maby ill just tell him to make his own box. lol, i do want to make it tho that way when i go to make a box for the new subs ill already kno what im doing.

can you PM me and walk me through the whole port calculation deal and displacment and such?

Matt

 

[cshaw 10+ year member]

heres a good walk through for ya

http://www.caraudio.com/forum/showthread.php?t=388838