The Kookaburra is a digitally controlled stereo headphone amplifier/pre-amplifier built around the Burr-Brown PGA2311 volume control chip. To control the volume, a microcontroller monitors the position of a simple potentiometer, and in turn sends serial data to the PGA chip. This approach results in a natural feeling volume control, but avoids sending audio signals through noisy and inaccurate volume pots.

Other key features of the Kookaburra are small size, onboard dual split-rail power supplies (+-5VDC and +-12VDC), optional input and output dual op-amp buffers (DIP or SOIC, DIP included in kit), and the ability to easily drive most headphones.

Common applications of the Kookaburra are as a standalone headphone amplifier, as a pre-amplifier for single-ended amplifiers, or both.

Read more about the Kookaburra on the DIYAudio thread here.

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