ok i've got 2 soundsplinter rl-p dual 4 ohm voice coil 12's with an eD nine.1 amp. i listen to all sorts of stuff, classic rock, classical, metal, hard rock, rap, but i really only feel the need for big bass if im listening to rap.
i prefer deep, rolling low bass to tight punchy bass. i THINK im going to go with a ported box, but they say they need 1.5-2 cubic feet for a ported enclosure, and theres only about 3 to be had total in the well right? i would like to keep it in the well, just so i can still see out the back, so its not obvious to everyone i have some serious stuff back there, and so you cant just break out my hatch and grab it.
dont really want to go fiberglass unless i have to to get the air requirements, for monetary reasons. anyone have any ideas, or pictures of a similar setup? thanks,
Shaun

 

Unless you use the entire rea area and maybe even part of the front seats you won't be able to fit a ported box for 2 12s in a third gen, atleast not one that is properly set up. after port displacement you will probably be in the neighborhood of 2.25-3 cubes just for one sub as the port area will need to be pretty big which will make the port long. I just finfished a box in my car using 2 9Kv2s which is 1.2 cu ft plus it has a port that is 6x3x54" long which puts my tuning at around 27 htz. Tuning this low isn't a must but even for a 1.5 cuft box tuned to 32 htz with 24^2 port you will displace around 2.4 cuft of space and you have to snake the port around alot.

 

http://www.soundsplinter.com/rlp_ser...endations.html
heres the link to the recommended enclosures for these woofers. from what i understand theres somewhere around 3 cubic feet in the well. going fiberglass could probably net me another half foot or so right? it says it needs 20 inches squared of vent space, and i'd want to tune it to 34 hz. what do you think, is this doable keeping my backseat, because this is a daily driver and with no hatch space, the backseat will basically be my cargo area. or where i stick people i really dont like and blow their eardrums
coming up to the backseat is fine but i dont want it completely covering the glass where i can't see behind me. im looking 3 or 400 bucks for a fiberglass box like this right?

 

decisions decisions.... how much difference would you say there would be between sealed and ported boxes? 5 db?

 

honestly you would be hard pressed with out and major modifications you will be hard pressed to get 2 ported back there. You would need 4.35 cu ft of space incuding port dicplacment. IMO you should be deciding whether you want 1 ported or 2 sealed.

Just to better gauge you box building ability have you ever built a ported box? I think you will be fine with just running both of them sealed esecially if you have never built a box for a 3rd gen and you have never built a ported box. Both can be difficult for a firstime build on their own and doing both together is just asking for failure.

 

alright what do you recommend for a sealed enclosure? im guessing the well is better than behind the seats, going by how many people use that configuration. what will give me the lowest, deepest, and loudest sound, angled forward, straight up, facing backwards, or something else?

 

Straight up in a box that fills the well. With the power you have You would be best to aim for 1.25-1.5 cu ft per sub. You can angle them forward or back but it is debatable whether or not it will make the subs louder.

 

i want the subs placed as low as i can get them, with as much space between the subs and the hatch, for the deepest sound right?

 

in my experiance it doesn't matter. The only thing that changes drastically is where the trunk rattle more

 

ok i have the sealed box in. there is about 2.9 cubic feet, without the speakers, and 2.6 or so with them in. i believe i could get 4.5 cubic feet back there, simply by building the same box, only bringing it forward all the way to the back seat. it would be about 3 inches tall, 39.5 inches wide and im guessing around 25 inches from the front of the well slant to the backs of the seats? (didnt measure that yet)
also, those are all inside dimensions, counting the mdf. if my math is right, that would give me another 1.7 cubic feet, bringing me over 4.5. i think it would look pretty nice.

thing is, i've never built a ported box. i think i did a very, very nice job designing and building my sealed box. basically i used the design in the sticky as a starting point, but i changed almost every dimension, and made it so the whole main section of the box wraps around the hatch pulldown, instead of just the very top piece, to get the most airspace i could back there. i got another 3 inches of width out of the bottom piece and inch or so of depth.

so im a capable box builder, but i've never done a ported box. where would i want the port to be located? im thinking i would tune the rl-p's to around 32 hz. the specs on their website say 34 hz and around 20 square inches port area is ideal, i was thinking 32 and a little more. is this doable?

obviously the port would either have to be firing forward directly at the backs of the back seats. i could fold the seats down and the ports would be about level with my head.
or else have them firing upwards, towards the hatch glass. i would get the best sound by having the port as far to the rear of the car as possible right?

 

and by the way, these rl-p speakers are NICE. i got my 200 amp alternator in the other day and will be putting in the 31 series yellow top and running 0/1 gauge to the back as soon as the terminals get here, so the amp is getting a little more voltage now.

they never miss a note playing rock, have to be the quickest most accurate speakers i've heard, they respond like 8's but hit like 15's.
play something like three 6 mafia or old no limit cd's and you better have some earplugs on you

im starting to wonder if my best bet wouldnt be to just make a little bigger sealed box and run 2 15s with a bigger amp. i can get a good deal on an orion 2500d, but the thing is huge, and im not sure i want that sitting under my hatch.

 

opinon:

subs sound better rear-firing.

 

im curious, how much airspace does the box for your 15's have? mines got almost 3 cubic feet without the subs, but i've been thinking about upgrading to 15's. i could get over 4 cubic feet by extending my box to the backs of the back seats.

are yours angled backward?

 

magic.



there's just enough room for my eD nINE.1 to fit between the seat and box... as long as I lean the seat forward when I put in the amp...