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No more GBAmp2s will be available. Please order enhanced GBAmp3 version, which includes headphones (mute speaker) support.
This is a "Hi-Fi" Class D amplifier for Gameboy Color internal speaker. Also works for Pocket and DMG-001, see pictures. Please read description carefully and pay attention to known issues.
I've got GBC and found rusted speaker with crackling noisy sound and it was barely hearable. Headphones is not the way out.
So I searched my parts bin for some tiny amp ic and found TI's Class D mono amp. Exactly what I need. I quickly designed and made small pcb to test it out with some random phone loud speaker. Sound was great and loud. You can read the full story at avrnoob.com
For the next version I selected other Class D amp from Analog Devices, it's even smaller. I pick smaller one so I can make pcb which fits in the speaker cutout in GBC, just on top of the speaker.
This one has updated amplifier ic again. Now it uses stereo audio signal. Added much more additional quality capacitors, so you do not need to instll additional capacitor to remove hiss/hum from the speaker. Also it has marking on the pcb where to connect each wire.
Main benefit is the sound volume, it's much louder than integrated amp, and takes no space inside.
Class D amp is very power efficient, this means longer battery life, significantly longer.
You need basic soldering skills to solder 5 wires.
You can view an installation guide here http://veretenenko.ru/anton/gbamp/
Due to manufacturing process you can get slightly discolored pcb, this has no side effects on functionality.
Every unit is tested before shipping.
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