First unit of the NanoStack family, this headphone amp was designed to be able to drive even difficult loads, while keeping the construction simple. To maximise repairability, it uses only standard parts available from various sources, so even possible discontinuation of any one component will not prevent maintenance and repair.
A simple 2-stage headphone amplifier with a focus on small size and easy assembly, without sacrificing sound quality.
A simple 2-stage op-amp topology, with paralleled output stage.
Input: 3.5 mm stereo
Output: 3,5 mm stereo
Power: USB, max. 1 watt in.
Operating voltage: 5 V in, converted internally to +9V and -9V.
2020-08-13: Production PCBs arrived
2020-08-04: PCBs available for preorder at Tindie
2020-08-04: A build guide was published on Headphonesty
2020-07-29: Second prototype built and works.
2020-07-20: First prototype built. Has hidden short.
2020-07-15: PCBs arrived.
2020-05-18: Received components, still waiting for the PCBs.
2020-05-02: OSHPark shipped the PCBs.
2020-04-23: Prototype went to fab.
2020-04-21: Prototype ordered from OSHPark