As you might have read in my previous installment I started playing with a relatively inexpensive Chinese Bluetooth receiver by doing some modifications to it.
PCM 1794 Bluetooth receiver
I bought this device from eBay to try if I can get a decent sound out of my smartphone when used as a source connected wirelessly via Bluetooth to the audio system. This is the more direct way compared to the case when a smartphone is used only to control the playback by means of communicating with a dedicated streamer via the local network.
Tube rectified power supply for Oto’s phono stage
I just recently finished an interesting project I would like to tell you about – a tube rectified regulated power supply dedicated to Oto’s phono board.
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DIY Stepped Attenuator
This project came in as a logical end of a continuous process of refining the amplifier’s performance. The itch to check out how a stepped attenuator will perform against the ubiquitous volume potentiometer became increasingly acute after the surgery that transformed my Audio Note OTO Phono SE Signature integrated into a P1 SE Signature power amplifier.
Audio Note AX-Two crossover project
Two coils, two caps and resistor, arranged across two drivers, with the purpose to divide the energy between them evenly. This is what I came up with after several months of experimentation. I tried almost everything, but it was the series crossover network that brought resolution and peace to my weary soul.