Marshall MB4210 Line-out Issue

Discussion in 'Amps and Cabs [BG]' started by ClaxTB, Dec 5, 2013.

  1. ClaxTB


    Aug 18, 2011
    First off, thanks in advance for any help on this issue.

    Basically, I've had my MB4210 for about a year and a half and it's never had this issue on it before, i've scoured the internet for a solution but no one else seems to have the same issue.

    Whenever I line out to my mixer through the emulated socket or the headphone socket, it distorts the sound no matter how low the volume is. I don't have a clue what it could be and i've tried altering different factors (bass, mixer, channels etc) but i'm truly stumped on this issue.

    Any ideas ladies and gentlemen?

    Many thanks,
  2. RickenBoogie


    Jul 22, 2007
    Dallas, TX
    You have to know what levels are coming OUT of the various outputs on the amp, and what type of level is required on the INPUTS of the other devices. For instance, if you're going to a mixer, you want to use the balanced DI OUT from the amp, (XLR cable), and use the trim control on the mixer to get a good clean signal in. The headphone OUT is only good for headphones, nothing else. So, first things first, what kind of outputs does your amp have?
  3. ClaxTB


    Aug 18, 2011
    Thanks for the quick reply!

    I always used the emulated XLR line-out on the back of the amp, never had issues with the using it before. I've tried adjusting the clip and the gain on the mixer, i've also tried different ports and a different mixer which leads me to believe there may be something wrong with the amp itself. I have no idea what though. :meh:
  4. grenadilla


    Aug 22, 2011
    Does your master volume not affect the XLR output? If not, your input volume on the modern channel and the gain and volume on the vintage do affect these outputs ( XLR and Effects Send). Your active-passive switch affects both channels and may need to be on "active" with the volume and gain less than half-way. Is your amp cleaner than the PA ?
  5. Maybe try switching between pre and post eq, try switching between channels, does it happen with either or both?
    The XLR output on this amp is very hot, I used to use a -20db attenuator pad, but if you've not changed any settings I don't know why it would start distorting now.
    Have you changed your bass or any pedals to increase the input?
    Any switches accidentally changed without you noticing?