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Reload Thread: Problem regarding Hifonics amplifier and subwoofers.

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    Trepkos's Avatar
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    Problem regarding Hifonics amplifier and subwoofers.

    This amplifier.

    +

    These subwoofers.

    ...in a 2.36ft^3 truck enclosure.

    So basic science would say that the amplifier using the speaker outputs provided with it(4 speaker outputs which are interconnecting within the subwoofer to bypass the need of the usual issue encountered when plugging two subwoofers to a mono amplifier), the two 2-Ohm subwoofers should show a 1-ohm load which should send 500watts to each subwoofer(1000w/2), the subwoofers RMS at 400w, so shouldn't I be able turn the gain down a tad and also ignore the Bass EQ and Bass boost to avoid possible distortion and clipping and still get a powerful bass response due to the slight overpowering of the amplifier?

    Well unfortunately with the Gain(or level as on the amplifier) turned to 12oclock, the phase turned to 0, the bass EQ to 0, the bass boost to minimum, the subsonic to...I forgot, Im thinking 20 or 30, and the low pass filter to 40hz. Ok that sounds pretty safe and nice....but no real bass response, even on more bass-heavy songs such as rap and techno.

    Any idea whats wrong?

    I can achieve loud "rattle your ears" bass, but only if I turn the gain to 0.2v, the bass eq to 5db and the bass boost to either half-way or 3/4 the way to maximum...and thats with the bass, treble levels on the HU set to their max, and the sub-woofer level on the HU set to normal(flat, 0). But I shouldnt need to do all this to get powerful bass because Im supposedly feeding these subwoofers 100 more wattage RMS then they are needing. The bass with these settings does not sound muddy or distorted either, its rather clean, loud, and punchy as you would expect from a sealed enclosure.

    Any idea on what I should do, any amp settings I need to change, troubleshooting procedures?







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    Re: Problem regarding Hifonics amplifier and subwoofers.

    turn the low pass up. about 70.




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    Re: Problem regarding Hifonics amplifier and subwoofers.

    Quote Originally Posted by mjf View Post
    turn the low pass up. about 70.
    Ok...



    Refs: BuckyBoy, 6spdcoupe, Harleyfx69, Blinkrazy
    1999 Regular Ford F150

    HU: Kenwood eXcelon KDC-X991
    Front Stage: 08' RainbowSLC 265.25 Components w/ CAL25 Silk Tweeter
    Front Stage Amp: Sundown SAX-100.2
    Sub Stage: 2x 12" Fi Q DVC 1
    Sub Stage Amp: Audioque 2200D
    Enclosure: 3.52 Dual Chambered Sealed Enclosure by BJ Fisher
    Deadening: RAAMAT BXT/Ensolite
    Wiring/Dis. Blocks: KnuKonceptz Kolossus/Krystal/Karma SS Wiring/JL Audio

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    Re: Problem regarding Hifonics amplifier and subwoofers.

    Any more takers?



    Refs: BuckyBoy, 6spdcoupe, Harleyfx69, Blinkrazy
    1999 Regular Ford F150

    HU: Kenwood eXcelon KDC-X991
    Front Stage: 08' RainbowSLC 265.25 Components w/ CAL25 Silk Tweeter
    Front Stage Amp: Sundown SAX-100.2
    Sub Stage: 2x 12" Fi Q DVC 1
    Sub Stage Amp: Audioque 2200D
    Enclosure: 3.52 Dual Chambered Sealed Enclosure by BJ Fisher
    Deadening: RAAMAT BXT/Ensolite
    Wiring/Dis. Blocks: KnuKonceptz Kolossus/Krystal/Karma SS Wiring/JL Audio

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    Re: Problem regarding Hifonics amplifier and subwoofers.

    Subs out of phase?



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    Re: Problem regarding Hifonics amplifier and subwoofers.

    set the gains with a meter.




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    Re: Problem regarding Hifonics amplifier and subwoofers.

    I would say that your crossover was set too low. 40hz is pretty low. I would try higher, as was recommended, at >=70. I use 80 because that's what my HU is preset to... but it sounds great.

    Also, doublecheck that the polarity of your subs are correct (+ -).

    And, set your gains w/ a DMM.


    (I'm full of original advice) B)




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    Re: Problem regarding Hifonics amplifier and subwoofers.

    Polarity is correct, I'll put the crossover to 70.

    How do I check the gains with a DMM? Like what am I looking for?



    Refs: BuckyBoy, 6spdcoupe, Harleyfx69, Blinkrazy
    1999 Regular Ford F150

    HU: Kenwood eXcelon KDC-X991
    Front Stage: 08' RainbowSLC 265.25 Components w/ CAL25 Silk Tweeter
    Front Stage Amp: Sundown SAX-100.2
    Sub Stage: 2x 12" Fi Q DVC 1
    Sub Stage Amp: Audioque 2200D
    Enclosure: 3.52 Dual Chambered Sealed Enclosure by BJ Fisher
    Deadening: RAAMAT BXT/Ensolite
    Wiring/Dis. Blocks: KnuKonceptz Kolossus/Krystal/Karma SS Wiring/JL Audio

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    Re: Problem regarding Hifonics amplifier and subwoofers.

    i 2nd what he just said. i need to learn this also




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    Re: Problem regarding Hifonics amplifier and subwoofers.

    You wouldn't happen to be running a LOC would you?

    If you are, perhaps your head unit has a High-Pass filter on whichever speakers you are tapping your LOC into attenuating the bass signal before it even gets to the amp.



    References : chaunb3400, Team H&K, diminishedpower, pickup1, sublime06, sporty_drew, JRock10, Jando86, sundownz

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    Re: Problem regarding Hifonics amplifier and subwoofers.

    Well, first of all, if you have (2) dual two subs, with all coils wired in parallel, you have a net impedance of 0.5 ohm. You might want to rewire them in series/parallel, or you may damage your amp. Also, 40hz low pass is pretty low, as stated previously.




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    Re: Problem regarding Hifonics amplifier and subwoofers.

    Wait, I'm confused. The subwoofer description says dual 2 ohm, and then also 2ohm svc. Which one is it?




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    Re: Problem regarding Hifonics amplifier and subwoofers.

    It's SVC 2-Ohm...yeah they did screw up their page but everywhere else it's listed as SVC



    References : chaunb3400, Team H&K, diminishedpower, pickup1, sublime06, sporty_drew, JRock10, Jando86, sundownz

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    Re: Problem regarding Hifonics amplifier and subwoofers.

    Yeah....its SVC...

    And.... I changed the crossover to 70hz, sounds alot better now. Still not like 500watts running to the subwoofers, but improvement.



    Refs: BuckyBoy, 6spdcoupe, Harleyfx69, Blinkrazy
    1999 Regular Ford F150

    HU: Kenwood eXcelon KDC-X991
    Front Stage: 08' RainbowSLC 265.25 Components w/ CAL25 Silk Tweeter
    Front Stage Amp: Sundown SAX-100.2
    Sub Stage: 2x 12" Fi Q DVC 1
    Sub Stage Amp: Audioque 2200D
    Enclosure: 3.52 Dual Chambered Sealed Enclosure by BJ Fisher
    Deadening: RAAMAT BXT/Ensolite
    Wiring/Dis. Blocks: KnuKonceptz Kolossus/Krystal/Karma SS Wiring/JL Audio

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