Hello everyone -
I have the Audiophonics streamer kit that fits in a very nice case with a color LCD display on the front. It’s a very well thought out kit and it works well when cold. I’m using a powered external USB drive and a wired network connection on it.
I have two issues I’m running into: power and heat.
For the power supply, I’ve used both the stock RPI 4 power supply and an Amazon Chinese 25VA linear power supply. With the standard RPI 4 power supply, Volumio will randomly cut out during playback sometimes. But I never get the lightning bolt icon on the screen.
With the Chinese 25VA power supply (with a heavy duty type C cable), the lightning bolt indicator regularly appears on the screen, but doesn’t effect function. Playback works fine.
I was thinking of modding the RPI by clipping the 5V pins that connect the Audiophonics DAC hat to the RPI 4 and using two separate power supplies. The linear PS for the DAC, the OEM for the RPI 4. Only because I have both already. Is clipping this pins necessary to keep the power isolated on the DAC side or is this not going to yield the intended gain?
The other issue I’ve run into is thermal throttling on the RPI 4 with Volumio. The thermometer icon appears on the screen after listening with Volumio for a few hours and the PI becomes unstable. Enabling the DSP plugin sends it into thermal throttling very quickly.
I read in some other threads, a lot of these streamers were based on the RPI 3 which didn’t have the CPU horsepower than the RPI 4 has. The RPI 3 were fine with ambient cooling.
Hence, cooling is an issue. I’m looking to mod the case to add two 50mm whisper fans powered by a third power supply. Any thoughts on this or other things to look for causing thermal issues? I’m using a large aluminum heat sink attached to the CPU.