Boss TR-2 Volume Filter Mod

Found this mod for the Boss Tremolo TR2 pedal on Harmony Central and it saved the day!

I found that the volume significantly dropped when I used the pedal, but after doing these easy steps, it sounds much better.

  1. Remove the bottom plate and the insulating plastic piece which is just inside.
  2. Carefully fold out the circuit board and find C4 in the middle of the board (it looks like a little silvery pillow, and the board says “C4″ next to it)
  3. Remove C4. You can use wire cutters, nail clippers, or even scissors. You can also bend it back and forth a zillion times until the two leads break.
  4. Replace the circuit board, insulator, and bottom cover. Done!

8 Comments so far

  1. stephen @ November 26th, 2006

    yea i cant find the C4 on my circuit board. i see C3,C5, but i cant find C4. could you email me a pic of the inside of your boss tr-2 pedal?

  2. Stephen @ December 2nd, 2006

    don’t have the pedal with me at the moment, but how old is your pedal? i found it right away. it’s right in the middle of the board.

  3. Eric @ January 4th, 2007

    Does this sort of volume anomaly happen in other BOSS pedals or processors? I currently use a GT-8 and I favor “signal interruption effects” like tremolo.

  4. Rog @ January 30th, 2007

    I bought a brand new TR-2 yesterday. There is no C4, (seriously - there is NO C4 marked on the board), but working through other comments, I decided it must be the largest of the caps: C26?

    I snipped one lead and used a short clip lead to try the pedal with the cap in/out of circuit. I couldn’t tell any difference either way. Perhaps the effects are only noticeable at higher volume??

  5. Paul @ January 31st, 2007

    I can’t find the C4 either! I bought the pedal a week ago.

    Cheers

  6. pinkbono @ April 16th, 2007

    me neither, i can’t find the C4 ! mine is 3 weeks old.
    pozdrawiam

  7. Steohen @ April 25th, 2007

    Hey.

    I have heard/read that new boss tr-2’s don’t have the same circuitry as the older ones and hence they may not have the C4 or they may have moved it or something

  8. Neo @ May 14th, 2007

    haha..
    it sounds great
    it takes 5 mins to mod,
    thx so much

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