View Full Version : box too small for 2 12" L7's?
11-29-2004, 08:19 PM
hey guys i had a questin about my pre-fab box. i kno most if not all pre-fab boxes are too small to begin with. i have a box for 2 12" dual 4 ohm L7's and was wondering what would be a good vented box size for these? i juzt got my kx1200.1 installed a few days ago and it doesn't seem like it's producing the bass it should. so how big should the box be for 2 12" L7's. seperate chambers of course. the box i have now is this box (http://electrogalaxy.dtopinc.com/index.html?object=xepl7212) i've never built a box before so i wouldn't kno that much about it. thanks.
11-29-2004, 08:29 PM
That thing LOOKS way small...
I got ~2.75ft^3 so about 1.375 per side BEFORE port & speaker displacement. So your looking right @ about 1 -1.1ft^3 per side. So yeah I would DEFINATELY build you a new box!
11-29-2004, 08:38 PM
**** and i spent $90 on it. now they're $75. but i used some calculators and it seems like that box would be big enough for 1 L7 if it was a single chamber. but does anyone kno where i can get plans or any box building programs? i have winisd but i can't figure out how to use it. btw i have a 98 ford escort se if that helps with a rough picture of the trunk size. and 2 amps mounted to the back of the seats that flip down but it doesn't go all the way back to the seats. maybe like an inch or 2 maybe 3 at most from the rear seat.
11-29-2004, 10:27 PM
Jmac sells plans for like $15 dollars, he pretty smart
11-30-2004, 12:58 AM
ok well i thought i'd give winISD a try at figuring out my box for my 2 12" dvc4 L7's. this was my first attempt for measurements for a custom box. can anyone tell me what would be enough for my 2 L7's? i decided to have them share the same airspace and use one rectangular port. the box i have now barely fit so i'll have to stick with the measurements of 14.5"D 33"W 14.5"H but i might be able to go an extra inch or 2 with the depth (trunk roof clearance-box fit maybe with 1 inch clearance on top but barely squeezed through the trunk opening-98 ford escort se 4 dr sedan). so if anyone can help me with a new box to fit those 2 L7's with the proper air space for em i'd greatly appreciate it.
11-30-2004, 02:23 AM
I HAD A PREFAB VERY SIMULAR TO THAT AND IT WAS 3.?? CF TOTAL..i think each side might had been 1.73 cf or sumtin..
11-30-2004, 05:57 PM
so can anyone tell me if these calculations are right? i might try building this or have someone build it for me. thanks
this box will have one port and the subs will share the same airspace. opinions if this box could be better or what you would change. thanks!
11-30-2004, 09:23 PM
any ideas anyone?
12-01-2004, 02:24 PM
Is that 2.6ft^3 per sub or gross. IMO I would go with between 1.5 & 2 ft per sub AFTER all displacements.
12-01-2004, 04:32 PM
well actually i was wondering if it'd be better to juzt use the same airspace cuz i have a small trunk and not a wide opening..the box i have now (33"wide) barely squeezed through the opening with maybe an inch of clearance from the trunk roof..how much would that affect the airspace of the subs? would i be able to make a lil more compact box than if they were seperate chambers?
12-01-2004, 06:01 PM
Not to thread jack or anything, but i have 2 of the same exact subs, 2 kicker L7's 4ohms. Would this box (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=14945&item=5734557938&rd=1) not work out well?
12-01-2004, 07:11 PM
idk. i was juzt thinking of going w/ a single chamber. i really don't want to waste more money on a pre-fab box idk will sound better..i spent $90 on this one. i'd rather go the cheap way this time..anyone who reads this..can anyone give me box plans or something? i have winISD but i'm a newb at working with it. i have no idea what the line graph tells me about the slope, i'm not sure about total ft^3 for my L7's. what would be ideal for em? if anyone can give me a good volume measurement i can figure the box size. i wanted to go ported as well (1 port, 1 chamber) if possible. thanks.