The best purchase I've made in many years I have heard many more expensive power cables and there has been an improvement in the sound, but this cable is to date the one...
This digital/analog conversion and amplification module for Raspberry Pi connects directly to the GPIO of the Raspberry Pi, allowing simple operation without special wiring. Although compact, the module integrates two TPA3126D2 amplifier chips capable of developing a power of 2x100W under 4Ω.
The Suptronics X5500 is a DAC and amplifier module that works as an extension of the Raspberry Pi (sold separately), interfacing between the two simply by using the 40-pin GPIO connector transmitting an I2S audio signal.