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    X450 HiFi DAC+AMP Expansion Board Hardware   Software
- Raspberry Pi 1 Model B+/ 2 Model B / 3 Model B / 3 Model B+ / 4 Model B
- Moode Audio Player
- Openelec
- Raspbian Jessie
- Volumio
- Pi Core Player

- Full-HD audio – up to 24-bit/192kHz playback
- Audiophile ESS Technology Sabre premier stereo DAC ES9023
- ES9023 delivers jitter-free studio quality audio with 112dB DNR
- Built in High quality Class-D stereo audio amplifiers (TI TPA3116D2 x2)
- Up to 2×100W Into a 4-Ω BTL Load at 21Vdc
- Capable of driving 4 Ohm speakers (also works with higher impedance speakers)
- Uses the Texas Instruments ultra-low-noise voltage regulator (output noise< 10μVRMS)
- Uses the Texas Instruments high efficiency step-Down DC converter (up to 95%)
- 6V~26Vdc converted to 5.1V, 3A to power the Raspberry Pi 
- Uses the genuine ALPS RK163 series potentiometer for smooth volume adjustment
- Built in high quality IR sensor (Vishay -the world's leading supplier of infrared receivers)
- Onboard 3.5mm stereo headphone jack allowing audio input form other audio devices
- Onboard pluggable speaker & power screw terminals
- Onboard PH2.0 connector allowing to connect a lighted power switch
- Onboard XH2.54 connector providing 5V output to power other devices
- Onboard gold-plated high-current DC power jack (5.5x2.5mm)
- Uses the digital I2S audio signals to reduce CPU load over USB audio solutions
- Connects directly to the Raspberry Pi - No wiring required
- Powers the Raspberry Pi - no additional power supply
- Reserved Raspberry Pi GPIO pin header (2x13Pins)
- Pop-noise can be improved by enabling GPIO control
- AMP can be enabled / disabled with jumper link
- Heat-sink attached to amplifiers for perfect heat dissipation
- Power supply: 6-26Vdc,≥3A recommended
- GPIO used : LRCK - IO19, BCK - IO18, DATA - IO21, IR - IO26, AMP mute - IO22
- Analog audio input level via onboard headphone jack : 2V RMS
- Amplifier max output power: 2×100W at 4Ω BTL Load at 21Vdc
- Resolution/Sampling Rate: upto 24bit / 192KHz (Raspberry Pi I2S)
- PCB size 87 x 56mm
Do not apply power to your Raspberry Pi via the PI's Micro USB socket.
    Box Contents
- X450 Expansion Board x 1  
- Screw M2.5 *6mm x 8  
- Spacer F/F M2.5 *20mm x 4  
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