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Reload Thread: Polyfil benefit with FI SSD high QTS option ???

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    memphis_vette's Avatar
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    Polyfil benefit with FI SSD high QTS option ???

    I have 2 FI SSD 10's that are down firing in a box under the rear seat of my truck. The box is approx .48 per woofer after displacement. The subs are fully loaded with the sealed high QTS option.

    FI states these subs work in a .2-.4 cube box with the high QTS option.

    My question is will I see any benefit to adding polyfil to my box?

    Thank you for your time



    System
    2009 Silverado 2500HD Duramax LTZ
    H/U- Pioneer AVH-4400
    Speakers- CDT 6.5
    Amp- Sundown SCV-2000D
    Subwoofer- 2x Sundown SA8V3
    Box- Custom 2^[email protected] underseat box by Pat (idyllic enclosures)
    Wiring- 0 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991




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    Side Show's Avatar
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    Re: Polyfil benefit with FI SSD high QTS option ???

    I doubt you'll hear any difference...... what are you trying to achive? might be worth your while looking into ported boxes




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    memphis_vette's Avatar
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    Re: Polyfil benefit with FI SSD high QTS option ???

    Can I run the subs in a ported box although they have the high QTS sealed option? Would they sound ok or hurt anything?

    The subs currently hit the lows just fine but it's the upper end that is pretty weak. I listen to a lot of rock and that strong punch isn't really there. I figured the polyfil would make them more responsive or punchy?



    System
    2009 Silverado 2500HD Duramax LTZ
    H/U- Pioneer AVH-4400
    Speakers- CDT 6.5
    Amp- Sundown SCV-2000D
    Subwoofer- 2x Sundown SA8V3
    Box- Custom 2^[email protected] underseat box by Pat (idyllic enclosures)
    Wiring- 0 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991

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    Re: Polyfil benefit with FI SSD high QTS option ???

    Polyfil could help slow some back waves and improve your upper sub bass response. You could also add some mass in the box to bring the volume down to ~.2 cubes per sub and see if that helps.



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    Re: Polyfil benefit with FI SSD high QTS option ???

    Quote Originally Posted by bbeljefe View Post
    Polyfil could help slow some back waves and improve your upper sub bass response. You could also add some mass in the box to bring the volume down to ~.2 cubes per sub and see if that helps.
    I'll give the polyfil a try, if not I'm only throwing away a few dollars.



    System
    2009 Silverado 2500HD Duramax LTZ
    H/U- Pioneer AVH-4400
    Speakers- CDT 6.5
    Amp- Sundown SCV-2000D
    Subwoofer- 2x Sundown SA8V3
    Box- Custom 2^[email protected] underseat box by Pat (idyllic enclosures)
    Wiring- 0 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991

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    Renzone3's Avatar
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    Re: Polyfil benefit with FI SSD high QTS option ???

    It would help a lot with low end extension so it doesn't hurt to do so.Just be sure you don't go overkill with the poly fill.




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    Re: Polyfil benefit with FI SSD high QTS option ???

    let us no how it goes, polyfils worth a shot




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    memphis_vette's Avatar
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    Re: Polyfil benefit with FI SSD high QTS option ???

    Will do, I'll get some on Friday and install it



    System
    2009 Silverado 2500HD Duramax LTZ
    H/U- Pioneer AVH-4400
    Speakers- CDT 6.5
    Amp- Sundown SCV-2000D
    Subwoofer- 2x Sundown SA8V3
    Box- Custom 2^[email protected] underseat box by Pat (idyllic enclosures)
    Wiring- 0 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991

  9. #9
    Side Show's Avatar
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    Re: Polyfil benefit with FI SSD high QTS option ???

    awesome, i'd say you would prob get more out of the subs if they were facing forwards instead of downwards, but you prob have limitations stopping you from doing that.




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    memphis_vette's Avatar
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    Re: Polyfil benefit with FI SSD high QTS option ???

    Yea I'm thinking it will do the trick for me. Subs are to large to forward fire and all the **** in my truck would damage them.



    System
    2009 Silverado 2500HD Duramax LTZ
    H/U- Pioneer AVH-4400
    Speakers- CDT 6.5
    Amp- Sundown SCV-2000D
    Subwoofer- 2x Sundown SA8V3
    Box- Custom 2^[email protected] underseat box by Pat (idyllic enclosures)
    Wiring- 0 gauge knu flex
    References Jacobman, Kmanian, marksrobert77, Beatnoutdaframe, tukn18s, Davidt487, Snakeye, Firebird 1991

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    Re: Polyfil benefit with FI SSD high QTS option ???

    It has benefit espeically on sealed boxes. Just look online and find a calculator for how much to add. There is a ratio that you use. It will help you pick up some low end and it works on boxes that were made smaller than spec. It makes a sub in a smaller box think the box is a bit larger.




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    Re: Polyfil benefit with FI SSD high QTS option ???

    Quote Originally Posted by Jroo View Post
    It has benefit espeically on sealed boxes. Just look online and find a calculator for how much to add. There is a ratio that you use. It will help you pick up some low end and it works on boxes that were made smaller than spec. It makes a sub in a smaller box think the box is a bit larger.
    ...your subs are self aware?!




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