My Markbass Little Marcus head won't stop humming

Discussion in 'Amps and Cabs [BG]' started by HouseOfCroutons, Jun 13, 2020.

  1. HouseOfCroutons


    Apr 26, 2020
    I'm trying to record something on Logic using my MarkBass Little Marcus amp head through a Focusrite Scarlett 2i2 interface, and I can't get my amp to stop humming/buzzing/whatever you wanna call it. I don't get this noise when I record straight into the interface, so it's gotta be the amp. But I can't record anything good using my amp, which is a shame because the tone is so much better with the amp.

    Anybody have a similar experience with this head or others? Or any potential solutions?
  2. rickdog

    rickdog Gold Supporting Member

    Mar 27, 2010
    "Humming" and "buzzing" are often used to describe different sorts of noise. Is it really humming (a deep "MMMM") or is it buzzing (sharp "ZZZZZ")?

    I'm not familiar with either the amp or the interface, but this is kind of a generic problem, and there are some generic causes and solutions.

    Some things in the "hum" category:

    Are you using a balanced cable (XLR connectors) between the amp and the interface? If not, and if the amp and interface both have those connectors, try a balanced cable.

    If you're using a balanced cable, does the amp have a "ground lift" switch? If so, try changing it, does it affect the noise?

    All the equipment - amp, interface, and computer - should be plugged into the same circuit. Try using an outlet strip that you can plug them all into.

    Some things in the "buzz" category:

    Is the amp close to the interface and/or the computer? Try separating them. The amp could pick up and amplify electronic noise from the computer or interface; or the amp could be generating noise (especially if it has a switching power supply) that the interface picks up.

    Light dimmers and LED light bulbs can generate electronic noise that affects pickups and amps. If you have dimmers, shut off those lights. If you have LED lights, turn them off or move a lamp to a different circuit.
    RSBBass and Adam Samolsky like this.
  3. HouseOfCroutons


    Apr 26, 2020
    Ground lift did it. Thanks for your detailed response!
    BassmanPaul, Crater and SJan3 like this.
  4. mmbongo

    mmbongo I have too many basses. Supporting Member

    Maybe it doesn't know the words??

    I'll see myself out now......
    Murch, abarson and BassmanPaul like this.
  5. 74hc


    Nov 19, 2015
    Sunny California
    I use a LM250 through a Scarlett 2i4 with no issues during these so-called pandemic times.
  6. BassmanPaul

    BassmanPaul Inactive

    So called?
    Adam Samolsky likes this.