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Low pass crossover

Discussion in 'Audio' started by ftn96, Mar 1, 2002.

  1. ftn96

    ftn96 1/2 ton status

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    Im trying to adjust my amp settings, and Im playing my favorite CD Soundgarden - Badmotorfinger. While the low pass is all the way down I can still hear the singer under all the rumble, but just barely. But I need to allow a little more frequency to pass through to get some low mids. 10's and 6x9's just dont seem to pic up the low end mids for a good heavy grunge music style. Any suggestions?

    Its the popping, rumbling, roaring, twisting, flexing, grinding, so you can wheel anywhere medicine[​IMG]
     
  2. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    It sounds like the "slope" of the crossover is too shallow. I don't know what the spec is, but you'll probably see something in the specs like Low Pass = 12dB/Octave

    If it's a number like 12 or 6.....that's probably the problem you've got (unless somethings just not wired right [​IMG]) For subwoofers, you typically want a "steep" slope so that once you hit the cutoff frequency, it doesn't play anything ABOVE that......

    For example, a 12db/Octave crossover set to 60Hz and playing at 100dB, will still be playing notes at the 120Hz value at 88dB!!! That's pretty easy to hear, and you will get the effect of "muffled singing voices" in that area.....

    What would be ideal, is a crossover slope of either 18dB/Octave or 24dB/Octave for the subs. That way, the cutoff is VERY sharp and you don't get those lingering frequencies in the subwoofers.



    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     
  3. ftn96

    ftn96 1/2 ton status

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    10-4. Thanks for the info. Its a cheapo Crunch amp. So I guess I cant expect too much. [​IMG]

    Its the popping, rumbling, roaring, twisting, flexing, grinding, so you can wheel anywhere medicine[​IMG]
     
  4. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    You could always buy an inexpensive 2-Way electronic crossover and just use the low pass part....? Make sure it has at least 18db/Octave though....

    I'm not sure how much it bothers you.....I just wanted to let you know there are still options to fix it if you want to.



    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     
  5. ftn96

    ftn96 1/2 ton status

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    I looked at the specs and its a 12. And to tell you the truth, it doesn't bother me at all as long as I know its not messing up my speakers!

    Its the popping, rumbling, roaring, twisting, flexing, grinding, so you can wheel anywhere medicine[​IMG]
     

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