Electronics Weekly (blog) Raspberry Pi goes Hi-Fi with audio valve amp Electronics Weekly (blog) The 503HTA, Hybrid Tube AMP/DAC is a small Hat size raspberry pi add-on developed by Pi 2 Design. It connects to the PI I2S port and its Burr-Brown PCM5102A DAC drives a single 12AU7 tube gain stage with solid state Class-A output. It is designed to …

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Raspberry Pi goes Hi-Fi with audio valve amp – Electronics Weekly (blog)