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Mesa/Boogie Road King has low or no output

If you’re Mesa/Boogie Road King has low or no output, there are a few things you should check out that might be causing this.

  1. Check the FX loop in the back of the amp. If any of your loops are turned on, the send level control will affect the overall volume of the amp. Be sure the send level is set somewhere in the middle for the best results. Also note that if you bypass the loops, your Output and Solo knobs will be disabled and the master outputs for each channel will now act as your master volume.
  2. Check the cabinet switching section in the back of the amp. If you are only using output A, make sure that each channel is set to output A. If you have any channel set to B, there will be no output, and if you have any channel set to A + B, you will have very low output. Please note that if you are only using output A, the Shorting Dummy Plug must be plugged into output B (where it was when you received your amp) or else you will severely damage the amp and void your warranty. You should only remove the Shorting Dummy Plug if you plug in another guitar cabinet to output B.
Road King Head

Road King Head

 

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