The BA3840KV is a preset graphic equalizer IC for headphone stereos. It combines two equalizer circuit channels on a single chip, and also includes a dynamic sound leak reduction circuit.

FEATUREs
1) Four sound quality settings are possible by DC control.
2) High-frequency sounds can be cut off based on the volume.
3) The sound leak reduction circuit can be turned on and off by DC control.

APPLICATIONs
    Headphone stereos
    Portable CD play