Altering or enhancing the internal components of audio devices to improve their functionality, sound quality, or add new features. This process can include various modifications such as upgrading capacitors, or op-amps to higher-quality components.

Altering or enhancing the internal components of audio devices to improve their functionality, sound quality, or add new features. This process can include various modifications such as upgrading capacitors, or op-amps to higher-quality components.