NES Top-Loader Expansion Audio. This kit is intended to facilitate a straightforward installation for the audio expansion upgrade, compatible with both authentic Famicom cartridges and a Flash Drive that supports expansion audio through cartridge pin 51.
This kit is designed for DIY enthusiasts. It serves as a drop-in upgrade for standard (unmodified) NES consoles. The installation requires additional steps when combined with composite or RGB upgrades. Currently, no detailed instructions are available. You may refer to the wiki page for further information.
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