Amp EQ Shelving Filters

Discussion in 'Amps and Cabs [BG]' started by PraiseBassing, Aug 14, 2018.

  1. PraiseBassing

    PraiseBassing Supporting Member

    Mar 6, 2017
    California
    Just trying to get a better understanding of these filters commonly found in eq’s. Is there some type of standardization for the corner frequency that is listed and slope for these in bass amps? Or is it dependant on the designer? I think the corner listed is usually the -3dB point, correct?
     
  2. ddnidd1

    ddnidd1 Supporting Member

    The corner frequency and slope are specified by the designer.

    The most common slope I've seen is 12 dB per octave.
     
  3. PraiseBassing

    PraiseBassing Supporting Member

    Mar 6, 2017
    California
    You are thinking of a low pass or high pass. 4DFEB996-800D-47A4-8115-8E4CB93B4B6D.png
     
  4. ddnidd1

    ddnidd1 Supporting Member

    Actually I believe I'm referring to shelving filters.

    EDIT: I just looked at some specs on my amps and the 12 dB reference is wrong.
     
    Last edited: Aug 14, 2018
  5. PraiseBassing

    PraiseBassing Supporting Member

    Mar 6, 2017
    California
    If you set a high pass filter with a slope of 12dB per octave at 80 hz; 40 will be -12, 20 -24, 10 -36, 5 -48, and so on.

    A shelf will slope down to a certain point and then level out. This is the nature of a shelf that I am trying to gain understanding of.
     
  6. ddnidd1

    ddnidd1 Supporting Member

    You are correct. Time for the morning coffee.
     
  7. PraiseBassing

    PraiseBassing Supporting Member

    Mar 6, 2017
    California
    I always enjoy more coffee!