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Reload Thread: Need port help fast!!! 2 L7 15's

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    sikotik's Avatar
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    Need port help fast!!! 2 L7 15's

    i have 2 L7 15's dual 2 ohm. i am putting them in an 02 civic si hatchback. i have a 6.2 cubic foot box 34" wide, 21" tall, 17.5" deep. i have the subs on the top firing upwards so i need to put the port towards the back I THINK. someone please help on how big and where. i am putting a ma audio hard kore 1800 watt amp and wiring to .5 ohm so it will push out 3600 watts.

    thanks for any input

    ps-looking for best SPL







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    Savstyle's Avatar
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    Re: Need port help fast!!! 2 L7 15's

    cant help with the box since i didnt check meassurement and 2 tired ot think, but have upgraded your electrical for that amp?



    They Call Me DARKNESS

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    Re: Need port help fast!!! 2 L7 15's

    That box is WAAAYYYYYYY too small



    REFS:JimJ, DBfan187, jimj, ology audio, excelerater, private pastry, kenny pollock, priosonnumber6, johnnyber, mattmmcs, vosschs, lax916, davidfre21, iceteebone, cd6551, vladd and others that I cant remember off the top of my head

    Quote Originally Posted by snb778
    I feel like when im bumpin once it gets dark....the street lights often go out. I was driving home the other night and like 3 street lights went out in like 15 minutes.
    Does this happen a lot to any of you??
    Also if you have had the twix ice cream......isnt it amazing!
    Quote Originally Posted by RumbleNTheTrunk
    damn. 8 10"s?........80" of cone area FTW!

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    Re: Need port help fast!!! 2 L7 15's

    a box to hold a 15 inch l7 for spl is recommended to be 6 cubic feet. you have a box big enough for one and you tryin to cram two into it, big mistake. your gonna need a box that is 12 cubic feet . i had one in a 6 cubic foot box in tha back of a cavaleir and i had to do major cutting to get it to fit. you might wanna go back and look at everything again.



    Headunit=KENWOOD- kdc-x789

    SUB= 1 kicker 15 inch L7
    in a 6cu foot box

    AMPS= 1 power acoustik 800x2 (power series)
    1hifonics brutus 1605d

    HIGHS= ma audio (hardcore series) 6.5 component set
    pioneer 6x9s (4-way)

    Optima yellow top battery, big3, and all 1/0 guage wire

    *soon to come is a directed audio 20 farad power bank*

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    Re: Need port help fast!!! 2 L7 15's

    Thats a 5.0cuft box with one sub and less with 2 after port/speaker displacement.
    Only big enough for one sub.
    Make your port 60sq" and 10.5" deep for one 15 slam 1800-2000 at it and wang chung tonight.
    If your dead set on both being in there your gonna choke it and only get 1-1.5 db more output at a full 3600 watts(which I dought it makes) and go with the same port except it will peak a lil higher and be over 60-65hz range cause your chokin the subs out and will likely sound like crap and youll hate life...........



    refs:Flakko,saywhat,mmata13(sold 1605D amp),nVRuckus(bought fuse blocks), dkguitarist(traded 2 amps),MikeyB(sold MD2),CBFryman2(sold MD2),gundecker (bought 20.1),Sakura (2 Trades),killahbean (bought DMX12),Loud3(Bought Fiberglass Kicks),tb2007(sold diamond amp),iamamp3pimp(bought box's 3 so far /sold 20.1/sold 2 L7s,ZX650.4),chillcat34433(bought 12"RF HX2), ultimate157(sold opti 2000D),bballrrt06(sold opti 2000D),GrnEydDvl(sold kx2500.1),BassAddictJ (sold kx2500.1),pwuthedon(bought Lanzar 4000D)

    lostsoul (5.25 mtx comps) Bad once I hooked them up.....................

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    Re: Need port help fast!!! 2 L7 15's

    well i think u could do 3.5 and be alright but u dont have anywhere near that so i would just do 1 15 or 2 sealed maybe



    2010-11 Project:
    1 15" DC XL
    1 ap3k
    1 3.5 cube adjustable port box (Box will be sub up port to drivers side, unless you have tips on better position?)

    Hoping to break 150 db's when this is all done in a 2dr Blazer!

    Reppin MINNESOTA

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    Re: Need port help fast!!! 2 L7 15's

    i have a 1.2 farad cap also. and kicker says that 3.0 cubes is small enough to go ported. so someone help please and quit hatin on 1 sub cause i have 2 and i am planning on using both.

    thanks




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    Re: Need port help fast!!! 2 L7 15's

    Quote Originally Posted by sikotik
    i have a 1.2 farad cap also. and kicker says that 3.0 cubes is small enough to go ported. so someone help please and quit hatin on 1 sub cause i have 2 and i am planning on using both.

    thanks
    Dude you box isnt even 6 cubes internal before sub or port. Either take our advise and listen or gtfo. FOOOKKKKKKKKK people drive me .
    That is all We're hating cuz you don't listen like most dam kids . Prolly in high school arent ya.

    Edit: Looked at sig....hope you're not still in HS



    REFS:JimJ, DBfan187, jimj, ology audio, excelerater, private pastry, kenny pollock, priosonnumber6, johnnyber, mattmmcs, vosschs, lax916, davidfre21, iceteebone, cd6551, vladd and others that I cant remember off the top of my head

    Quote Originally Posted by snb778
    I feel like when im bumpin once it gets dark....the street lights often go out. I was driving home the other night and like 3 street lights went out in like 15 minutes.
    Does this happen a lot to any of you??
    Also if you have had the twix ice cream......isnt it amazing!
    Quote Originally Posted by RumbleNTheTrunk
    damn. 8 10"s?........80" of cone area FTW!

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    Re: Need port help fast!!! 2 L7 15's

    first of all, I am not just a **** KID. i am 23, married, a father, and own my own business. but thanks for the input though.




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    Re: Need port help fast!!! 2 L7 15's

    ok i need just a straight up answer. would it be better to do both sealed or port it? thanks for any input




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    Re: Need port help fast!!! 2 L7 15's

    Well this is a nice coincidence. I re-registered on this forum again (lost my old login and can't remember the email I used, gurrr ) specifically to ask about my configuration, which is almost the same as the original poster's.

    I have two 15L7's and will be putting them in a 2000 Monte Carlo LS using the same MA amp. I'm planning to build the box myself, ported to 30hz. I figure if I want later I can just plug the port to try sealed. In building the box I'm shooting for about 6cf so it doesn't take up the whole dang trunk.

    Now, my questions... What should the port area be? (Assume 6cf 30hz) Should the subs share airspace? Would an isobaric configuration help?

    Thanks




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    Re: Need port help fast!!! 2 L7 15's

    Ok. Let me tell you a story. My friend has two kicker 15" L7's and our box is about 6.5-7ft tuned to 42hz(kicker reccomendation higher than average tuning!). When we had a Kenwood KAC-X811d on it they were getting about 1000W MAX, 1%THD@12.0V!!. It sounded decent, porbably louder than almost all peoples pairs of 12's and W7's. Then he decided to sell me the amp (sig) and he got an orion 2500D with 1/0 guage. The car has a stock luxury package chrysler vehiucle probably can withstand 2200w for short bursts. Ok when we swapped the kenwood for the orion, the difference was very very insane. It was by far the loudest vehicle in our town of about 15,000 people. It was pretty crazy and our box was built very very well, double thick face, interior resin. Then we took his back seat off and HOLY ****. Since our box had the port coming in the bottom of the rear seats wtih the subs facing upwards, (*** half backwards crx box basically) there was major cancellation in the back of the car with the subs facing that way. When we took out the seat OMG WE COULD NOT SIT IN THE CAR, WE ONCE COULD NOT EVEN CHANGE THE SONG THAT WAS PLAYING UNLESS WE PLUGGED ONE EAR AND LET THE OTHER ONE GET MURDERED! We had the kenwood metered 5 mins after installing the L7's, 04 model, into the box, still stiff, with 1000watts from the kenwood and 4 guage wire and major insulation and cancellation in the rear we hit 139.0 on the new terb lab. With the orion, 1/0 guage, and removing the insulation from the rear seats, and the 6x9s i would guess that it had better get close to 146.2 on the TL thats only a 7b increase and we spent quite a bit on the upgrades. Hope this helps, if you really have the 1800-3600 watts on tap with a good battery, then go for it and get put them in the 6ft box. You could always sell them for a setup that loves the 6ft gross box! I dont know what i would do lets see what others think. Sorry i know this post is really confusing im ****.




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    Re: Need port help fast!!! 2 L7 15's

    You said tha you wanted SPL and 30hz aint gonna get you there and will take up more airspace which you dont have........
    My above specs will get you a 43-45hz tune and be good for SPL if you want 41-42hz make the port 12.5" long,if you really want 30hz then make it 31-32" long.

    But like I said you can make 1 sound as loud as 2 in that small enclosure.
    Have a nice day.



    refs:Flakko,saywhat,mmata13(sold 1605D amp),nVRuckus(bought fuse blocks), dkguitarist(traded 2 amps),MikeyB(sold MD2),CBFryman2(sold MD2),gundecker (bought 20.1),Sakura (2 Trades),killahbean (bought DMX12),Loud3(Bought Fiberglass Kicks),tb2007(sold diamond amp),iamamp3pimp(bought box's 3 so far /sold 20.1/sold 2 L7s,ZX650.4),chillcat34433(bought 12"RF HX2), ultimate157(sold opti 2000D),bballrrt06(sold opti 2000D),GrnEydDvl(sold kx2500.1),BassAddictJ (sold kx2500.1),pwuthedon(bought Lanzar 4000D)

    lostsoul (5.25 mtx comps) Bad once I hooked them up.....................

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    Re: Need port help fast!!! 2 L7 15's

    Yeah it depends if you want real mic SPL or a loud car when your playing any music. Lower tuning sounds louder to the ear even at less sound levels




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    Re: Need port help fast!!! 2 L7 15's

    Naw the other dude said he wanted SPL. I want mine to hit low, even if it's not as loud on a meter. I don't intend to compete with it, daily driver.

    amartin, that was an interesting story, but what does it mean for me? Which setup do you recommend I use without making the box take up the whole trunk?




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