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Help: How to Tune Amp/Sub

Discussion in 'Audio & Video' started by Krewblink, May 7, 2012.

  1. May 7, 2012 at 8:12 PM
    #1
    Krewblink

    Krewblink [OP] Well-Known Member

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    I just got a amp and sub and loving it but, I need to tune it better. One knowb Says Subsonic 10Hz - 40 Hz Then Low Pass is from 40 Hz - 300 Hz. And the Level is 0.2V - 12V. Can someone Clarify? Im looking for a Deeper sound.
     
  2. May 8, 2012 at 4:24 AM
    #2
    mattg43

    mattg43 Well-Known Member

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    Need to know your setup:

    Sub
    Amp
    head unit
    Box size
    Sealed or ported
    If ported, tuning of the box


    The sub sonic is a filter to limit the low frequencies sent to the sub to prevent damage. Normally used with a ported setup just under the tuning frequency.

    The low pass is the filter to set what frequencies get to the sub. This should be set around 100hz as a starting point, and then adjusted. I would not go higher than 125hz, or lower than 80hz as a starting point.

    The level is an adjustment to help match up the input voltage coming from the head unit into the amp. This is to ensure the proper power is added when using the volume knob. Without a setup list, this is difficult to answer. Remember it is NOT a volume knob.

    There are several tutorials online for the noob, look at the JL Audio Gain Setting tutorial for a run through on a basic setup.
     
  3. May 8, 2012 at 10:05 AM
    #3
    pinktaco808

    pinktaco808 Hot Steppa

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  4. May 8, 2012 at 5:51 PM
    #4
    Krewblink

    Krewblink [OP] Well-Known Member

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    thanks for the info.

    Non Ported Box 8 inch Kicker SUB
    DDX6019 KENWOOD HEADUNIT
    MB QUART FX1.400 MONO SUB

    I just adjusted it and its sounding way better.

    I adjusted the level to 0.8 volts. idk if thats too high or too low..
     
  5. May 8, 2012 at 7:47 PM
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    mattg43

    mattg43 Well-Known Member

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    I wouldnt worry to much, in all honesty. The deck is rated for 2v pre-outs, but unless you test the head unit to see where that 2v is reached (generally at the peak of output before distortion), so below that volume you will not get anywhere near 2v. Just note, if you can feel the bass at low volumes, its probably up to high. Keep it balanced with the rest of the music, and have fun.

    If you like it at .8v, rock it. Worst case, is you blow the sub after months of use and abuse, and you drop another 50-75 bucks on another 8" driver and turn the gain down.

    With that said, I doubt you will have a problem.
     
  6. May 8, 2012 at 10:27 PM
    #6
    Krewblink

    Krewblink [OP] Well-Known Member

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  7. May 13, 2012 at 9:27 PM
    #7
    shaneckc

    shaneckc Fyntünd Designs Vendor

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    you should turn the subsonic filter down to 10hz (preferably lower, but we will just have to work with 10hz for now). then turn your input sensitivity to .2 and set your low pass to 300hz. then play 0db test tones for long periods of time to break in your new equipment. if your head unit has equalization capabilities, add a minimum of 6db increase right around 25hz.

    hope this helps

    (just kidding)
     
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