JRC3586D - Audio Amplifier
This is the often-used audio amp on a chip. Found in several commercial and DIY circuit projects. Can also be used to build a headphone amp or a small 1/4-watt practice amp.
This particular part, JRC386D, is preferred over the LM386 in some circuits, such as the Beavis Audio Tube Cricket and the Penny Pedals Finger Print.
Made by New Japan Radio Corporation