Bucket Mouse's sound amplifier from the MGBC adapted to the stock GBC. This mod replaces the original MGB AMP for better sound rather than add a boost to a dated design.
pikayellow.mp4
Big shout out to the Mouse for all he does for the community
NOTE: You are responsible if you f*ck it up. This board requires microsoldering. This board isn't compatible with CPU 05 and CPU 06 boards. It is made to work with boards that have EM2,3,4
Remove the following parts
Install the board, soldering to the points it aligns to
EDIT: Make sure you bridge EM5 or just leave the filter there