Switches on the preamp..

Discussion in 'Amps and Cabs [BG]' started by Flambeu, Oct 27, 2001.

  1. Flambeu


    Apr 14, 2000
    Hi everyone!

    I know my questions may sound a bit silly to you, but I can't live with my ignorance any longer :)

    How do the Presence and Gain switches effect the sound?

    As for the EQ, I understand what it does, but I don't understand when I should use it...

    Help? :confused:

    Thanks. :)
  2. rickbass

    rickbass Supporting Member

    They don't sound silly at all, so all is cool (don't ask - stay ignorant, right?) Here's a non-tech answer from a non-techie.

    Presence - brings out the upper harmonic content. Compare with turning up your treble control. Notice how the Presence gives you a glassier, sharper, different, high end?

    Gain - Try comparing this control with your volume. It regulates/matches the amount/strength of your signal from the instrument to the amp. This has to be balanced with your volume control(s) to get the strongest signal possible with the least amount of noise. If your profile was filled out (a necessity to get intelligent answers usually) I might know if your amp has a clip LED and we could talk about gain staging your amp.

    Some people mistakenly think Gain is another volume control by another name - it's not.

    EQ will allow you to tailor your sound/frequency ranges to use different rooms to their best advantage. For instance, if you are playing in a room where you have trouble being heard with a loud guitarist or keyboardist, boosting the mid-frequencies of your EQ's mid-freq's usually allows your sound to cut through. Without knowing whether your amp has graphic EQ, parametric, both, et al, it's tough to address your specific situation.

    But, it's safe to say most bassists these days favor "the smile" - the low and high freq's are boosted up and the mid freq's are dropped down, forming a "smile" or "U" shape on a graphic equalizer.
  3. Flambeu


    Apr 14, 2000
    Thank you for your answer, you've been very helpful.

    As for the EQ, it's graphic. I used to set it to "smiley" too, but now I usually play with even EQ. Now that I'm a bit more knowledgable, perhaps it's time to put some thinking into this setup...

    Thanks for your help.