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    ATTN: 80inches and other 4th order experts

    I'm getting ready to start a new build for my Lexus GS300.

    I want to build a 4th order ported through the factory 10" sub cutout hole in the rear deck using a 10" tube as a port from home deport or a square port.

    I need some help in creating a 4th order enclosure.

    Post up some rough numbers of different chamber sizes so I can get an idea of where to start.

    I've got about 4 cubes to work with.... 30 width x 12 height x 24 depth

    I've got 1500rms to work with, I haven't decided on what sub/s to use. I was thinking of using a couple of 10's or a single 12, let me know what you think would be a perfect match for the 1500rms I've got to work with.

    Here's a few pics of the ride, I'll get more pics of the trunk later today...





    Last edited by SHiZNiLTi; 03-09-2009 at 05:26 PM.







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    Re: ATTN: 80inches and other 4th order experts

    Here's some quick some quick 30 second sketches I made of a couple different ideas on the design, let me know which one would work better. I've seen alot of people with blow throughs use the box where the subs face each other...









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    Re: ATTN: 80inches and other 4th order experts

    you almost HAVE to have specs for a bp. 1 15? Might work but really you need t/s parameters to work it up. I did one the other day playing around with 2 re se15's and it came out to about 13cubes. Maybe a couple 10s



    refs
    woc47, nigro013, defconx3, louisiana_crx, bld 25, supa_c, lancer1978, sxkicker89, 310w6, more, i forget

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    Re: ATTN: 80inches and other 4th order experts

    Quote Originally Posted by SHiZNiLTi View Post
    Nice Ride.




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    Re: ATTN: 80inches and other 4th order experts

    A single 15" would be too tall for the box to fit. I'm looking at a 12" Fi BTL or the new XCON, it would work with the design on the left pictured above...

    Fs: 39.3 Hz | 37.9 Hz
    Re: 0.7 Ohms/coil | 1.4 Ohms/coil
    Qms: 5.09 | 5.28
    Qes: .21 | .20
    Qts: .20 | .19
    Mms: 206g | 222g
    Sd: 480cm^2 | 480cm^2
    Vas: 25.7 l | 25.7 l
    Spl: 90.5dB 1W/1m | 90.3dB 1W/1m
    Bl: 18.3 N/A | 27.2 N/A
    Xmax: 28mm * | 28mm *
    Rms: 2000W * | 2000W *
    Sealed box: N/A cuft | N/A cuft
    Ported box: 1.75-3cuft | 1.75-3cuft
    Sub OD: 12.500” | 12.500”
    Cut ID: 11.125” | 11.125”
    Mounting depth: 7.250” | 7.250”
    Displacement: 0.18cuft | 0.18cuft




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    Re: ATTN: 80inches and other 4th order experts

    which specs? dual1 or dual2?



    refs
    woc47, nigro013, defconx3, louisiana_crx, bld 25, supa_c, lancer1978, sxkicker89, 310w6, more, i forget

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    Re: ATTN: 80inches and other 4th order experts

    i did the dual 2 and it doesnt model out very good at all the f3 is 97 hz on the recomended setting and moving tuning down the decreases output a whole lot, does the xcon have specs yet?



    refs
    woc47, nigro013, defconx3, louisiana_crx, bld 25, supa_c, lancer1978, sxkicker89, 310w6, more, i forget

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    Re: ATTN: 80inches and other 4th order experts

    i thought gmonk had btls in a bandpass, maybe ask him about his box



    refs
    woc47, nigro013, defconx3, louisiana_crx, bld 25, supa_c, lancer1978, sxkicker89, 310w6, more, i forget

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    Re: ATTN: 80inches and other 4th order experts

    Quote Originally Posted by jdawg View Post
    i did the dual 2 and it doesnt model out very good at all the f3 is 97 hz on the recomended setting and moving tuning down the decreases output a whole lot, does the xcon have specs yet?
    I'll have to check with mark for the XCON specs. I didn't see them on the website. Thats good to know about the BTL, I was gonna go for a 2ohm load on the amp, so dual 1 ohm for a single 12.

    If I decide to not go with a single 12, I'll get (2) 10" Mach 5 IXL IXL-10.2.2's, looks like a great sub and the price is decent, how do you think that would work out...

    http://www.mach5audio.com/zen/index....roducts_id=187

    T/S Parameters
    Fs = 27.8 Hz
    Re = 3.7 Ohms
    Qes = 0.46
    Qms = 6.44
    Qts = 0.43
    Mms = 234.1 g
    Rms = 6.34 kg/s
    Cms = 0.14 mm/N
    VAS = 13.9 litres
    Sd = 265.9 cm2
    Xmax = 20 mm




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    Re: ATTN: 80inches and other 4th order experts

    it looks alot better the f3 is about 30hz but im getting .7 cubes total for the whole box, im still messin with bandpasses in bb6 so maybe im doing something wrong



    refs
    woc47, nigro013, defconx3, louisiana_crx, bld 25, supa_c, lancer1978, sxkicker89, 310w6, more, i forget

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    Re: ATTN: 80inches and other 4th order experts

    Im gonna try some of the online 4th order calculators and see what happens.

    I'll post link and results.




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    Re: ATTN: 80inches and other 4th order experts




    refs
    woc47, nigro013, defconx3, louisiana_crx, bld 25, supa_c, lancer1978, sxkicker89, 310w6, more, i forget

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    Re: ATTN: 80inches and other 4th order experts

    Quote Originally Posted by SHiZNiLTi View Post
    Im gonna try some of the online 4th order calculators and see what happens.

    I'll post link and results.
    what ever u go with please treat that Lexus right




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    Re: ATTN: 80inches and other 4th order experts

    I can help you with a bandpass for the 12. PM me.




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    Re: ATTN: 80inches and other 4th order experts

    This guy in the Impala had good luck with his 4th order ported through rear deck...

    http://www.youtube.com/watch?v=PhPCC5pkUDM

    I allways like watching Frankie's Lexus GS300 Flex.

    I showed these vids to the guys on clublexus forums and they freaked out, they didn't know what real bass was...

    http://www.youtube.com/watch?v=qQB4PW3tWew
    http://www.youtube.com/watch?v=jYqIqdiaz_o
    http://www.youtube.com/watch?v=1hOMvsewtDA
    Last edited by SHiZNiLTi; 03-07-2009 at 06:25 AM.




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