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50hz and 120hz knobs in equalizer

Discussion in 'Pickups & Electronics [BG]' started by Alexdeth89, Nov 19, 2012.

  1. Alexdeth89


    May 7, 2012
    I'm a big fan of active basses and since there is no room in my passive PJ for active electronics I decided to purchase a Behringer bass pedal. It's a 7 band equalizer but I only use 2 frequencies to simulate the sound of a 2 band active onboard preamp (bass and treble).
    The specific frequencies I use are 120hz for bass and 4.5khz for treble, I am so pleased with the results it sounds awesome, it sounds exactly the same as the active basses I have played in stores and other places.

    The only thing I find strange is the fact that the overall tone sounds better with the 120hz rather than 50hz and I find it strange because most preamps like emg, aguilar etc. have values for bass between 30 and 40hz so I thought I was going to use the 50hz but it sounds a bit "tamed" and punchier.

    With the 120hz the lows are deeper and growlier, it's just a much better tone.
    I have tried the pedal with more basses and the result is the same so my bass is not the issue.
    I don't know if maybe the values are reversed or maybe the 50hz knob is deffective.
    what do you guys think?
  2. 50Hz is only the center of the frequency band. Not all equalizers are the same.
  3. rumblinbass


    Aug 22, 2003
    Wimberley, TX
    I assume that you are talking about the BEQ700...
    keep in mind that most onboard preamps use shelving or baxandall type filters. the behringer is most likely a peak or bell type. will sound quite different.
  4. NKBassman

    NKBassman Lvl 10 Nerd Supporting Member

    Jun 16, 2009
    Winnipeg, MB, Canada
    I don't know why you limit yourself to using only 2 bands. That's like buying a fancy car and never taking it out of first gear.

    Mess around a bit with the other frequency sliders! You might find an even better sound with a little tinkering.
  5. They would use peaking bands for the first and last bands? That's rather absurd.

    In any case, there are different types of shelving bands. Just because the frequency center is the same, it does not mean that all surrounding frequencies will be affected in the same manner.
  6. Yes and no. There are technical arguments for things like reduced headroom, increased noisefloor or phase shifts, caused by the over-use of equalization. In general, it is best to use as little equalization as possible. Any soundguy would tell you this, but on instruments, people like to use equalizers for tonal effect moreso than correcting problem frequencies. The same rule of thumb applies, however. Use as little as possible to do what you want.
  7. rumblinbass


    Aug 22, 2003
    Wimberley, TX
    ok. whatever. I said things like "assume" and "most likely". never did I claim for certain what type of filter was used.
    Why would peaking filter for first and last band be absurd. I actually prefer peaking for low frequencies. allows for boosting 50/60Hz without adding a bunch of mud. sounds cleaner and clearer.

    I am well aware of the many types of filters and equally aware of the many different ways to characterize and describe the frequency response.
  8. The first part of my response was a question, and the second part was meant for the OP.

    It seems odd to me that an equalizer would not provide high and low shelves.
  9. khutch

    khutch Praise Harp

    Aug 20, 2011
    suburban Chicago
    A seven band EQ should have narrower filters than the two or three band EQs on an active bass. You should not expect the two to behave the same. If you are happy with the results you are getting then there is no need to worry but I have to agree that with seven bands to play with you should play with all of them because the extra flexibility could be quite useful.

  10. SGD Lutherie

    SGD Lutherie Banned Commercial User

    Aug 21, 2008
    Bloomfield, NJ
    Owner, SGD Music Products
    50hz is lower than you might think. Since these are not as wide as a two band EQ, the 50Hz band is not also lifting the bands above it. To simulate a 2 band EQ you would move a few of the low frequency sliders to form a curve.

    I like around 75Hz to 100Hz for bass controls.
  11. Alexdeth89


    May 7, 2012
    Really? That's interesting, I only have 50hz, 120hz and the next slider is 400hz
  12. iiipopes


    May 4, 2009
    50Hz is the fundamental pitch of roughly G 3rd fret E string. Of course, that means only the fundamentals on the lowest notes are affected.

    120Hz, on the other hand, carries the octave harmonics of the lowest notes and the fundamental of the middle notes. So the ear hears more difference. Almost all "traditional" bass tone controls, like on stereos (With all the personal electronic devices out there, there are still stereo home units being used, aren't there?) are "hinged" at @ 200 Hz, which means the frequencies between @ 100 & 150 Hz are what are affected most, just like SGD Lutherie posted.
  13. Depending on where you are in the world, I would be careful with 50Hz as a frequency center. 50Hz is the fundamental frequency of power in some parts of the world, and thus, attempts to boost that frequency will bring out 50Hz hum.
  14. Alexdeth89


    May 7, 2012
    So, should I do the same with the treble (4.5khz) to simulta the 2 band preamp? I mean boosting the next freq which is 800hz
  15. NKBassman

    NKBassman Lvl 10 Nerd Supporting Member

    Jun 16, 2009
    Winnipeg, MB, Canada
    Do whatever sounds good to you.