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Reload Thread: 6.5" subs in small front enclosures,,,

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    6.5" subs in small front enclosures,,,

    either in the center console, kick boxes, doors wont work (on my car anyways)... what i want to do is run my 10" subs in the trunk from 25 to 50hz, then have the front 6.5"subs take it to 150hz, then the regular 5.25" door speakers take it from there...

    id need a three-way crossover 18db/octave ... any suggestions? anybody else set up their systems this way??



    1969 BMW 2002
    a/d/s/ 320is front components powered by:
    PPI/Crutchfield Blue 4x75 (two channels unused--no rear fill!)
    partitioned 2 cu.ft. sealed box holding 2x10" subs (shopping for new BUDGET subs at the moment!)
    subs will be 4ohm DVCs wired in series internally and then in parallel to a bridged OLDskool PPI 2125 amp for 4ohms @ 370w
    Elderly Kenwood CD deck
    Audio Control EQL system EQ




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    helotaxi's Avatar
    helotaxi is offline Kilroy was Here



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    Re: 6.5" subs in small front enclosures,,,

    If they're truly subs, let them roll off naturally on the bottom end. Keep the rear sub down really low but crossed in the 80-100hz region. If you want to really rock out turn the rear sub up.



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    Re: 6.5" subs in small front enclosures,,,

    Quote Originally Posted by helotaxi View Post
    If they're truly subs, let them roll off naturally on the bottom end. Keep the rear sub down really low but crossed in the 80-100hz region. If you want to really rock out turn the rear sub up.
    i would rather have at least a highpass on them at 50-60hz, for power-handling purposes. i want to be able to pound the front "subs" and cut out the low stuff to limit midbass distortion.. I want to be able to pound out the deep bass in the trunk and then let the front "subs" take up the midbass.

    rear sub (active lowpass):
    2x10" ==> 25-50/60hz (370w mono)

    front midbass (active bandpass):
    2x6.5"==>50/60-150hz (2x75w stereo)

    front components (active highpass):
    2x5.25"==>150-3000hz (2x75w stereo)
    2x1" ===>3000-20,000hz (passive from ^^)



    1969 BMW 2002
    a/d/s/ 320is front components powered by:
    PPI/Crutchfield Blue 4x75 (two channels unused--no rear fill!)
    partitioned 2 cu.ft. sealed box holding 2x10" subs (shopping for new BUDGET subs at the moment!)
    subs will be 4ohm DVCs wired in series internally and then in parallel to a bridged OLDskool PPI 2125 amp for 4ohms @ 370w
    Elderly Kenwood CD deck
    Audio Control EQL system EQ

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    helotaxi's Avatar
    helotaxi is offline Kilroy was Here



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    Re: 6.5" subs in small front enclosures,,,

    Fair enough. I would run kicks to keep the stereo separation.

    Reading your sig, I have a suggestion on an improvement that won't cost anything. The way you plan to wire your subs to the amp is less than optimal. Reverse your plan and you will get better results. Series wire each sub's coils and then parallel the subs. Same load but a slightly different outcome from the stnadpoint of driver interaction.



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    Icon10 Re: 6.5" subs in small front enclosures,,,

    Quote Originally Posted by helotaxi View Post
    Fair enough. I would run kicks to keep the stereo separation.

    Reading your sig, I have a suggestion on an improvement that won't cost anything. The way you plan to wire your subs to the amp is less than optimal. Reverse your plan and you will get better results. Series wire each sub's coils and then parallel the subs. Same load but a slightly different outcome from the stnadpoint of driver interaction.
    what is the theory behind that?

    someone on the "general" forum suggested the Coustic XM6, which will let me run the midbass subs from as low as 40hz (i will prolly run 50-60hz) and the upper cutoff at 300hz, which is higher than i wanted but should work anyways. It will let the a/d/s/es run as midranges and above and rely on the front subs for all the midbass (50/60hz-300hz). should work nicely, and the coustic is relatively cheap! now just need to figure out what front subs to use....


    EDIT: OH DUH THAT WAS YOU!



    1969 BMW 2002
    a/d/s/ 320is front components powered by:
    PPI/Crutchfield Blue 4x75 (two channels unused--no rear fill!)
    partitioned 2 cu.ft. sealed box holding 2x10" subs (shopping for new BUDGET subs at the moment!)
    subs will be 4ohm DVCs wired in series internally and then in parallel to a bridged OLDskool PPI 2125 amp for 4ohms @ 370w
    Elderly Kenwood CD deck
    Audio Control EQL system EQ

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    Gary S's Avatar
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    Re: 6.5" subs in small front enclosures,,,

    Quote Originally Posted by helotaxi View Post
    I would run kicks to keep the stereo separation.

    .


    - This is very important.


    Quote Originally Posted by helotaxi View Post
    Series wire each sub's coils and then parallel the subs. Same load but a slightly different outcome from the stnadpoint of driver interaction.
    - Is this the JL Audio theory - don't wire separate drivers in series?



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    Re: 6.5" subs in small front enclosures,,,

    taxi, i changed my sig... if its good enuf for JL,,,,,



    1969 BMW 2002
    a/d/s/ 320is front components powered by:
    PPI/Crutchfield Blue 4x75 (two channels unused--no rear fill!)
    partitioned 2 cu.ft. sealed box holding 2x10" subs (shopping for new BUDGET subs at the moment!)
    subs will be 4ohm DVCs wired in series internally and then in parallel to a bridged OLDskool PPI 2125 amp for 4ohms @ 370w
    Elderly Kenwood CD deck
    Audio Control EQL system EQ

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