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Raspberry pi HD Audio X450
Raspberry pi HD Audio X450
Raspberry pi HD Audio X450
Raspberry pi HD Audio X450
Switching power supply for X450


X450 DAC+AMP Expansion Board


Item Description
Compatible with Raspberry Pi 1 Model B+/ 2 Model B / 3 Model B / 3 Model B+
Operating System Moode Audio Player
Raspbian Jessie
Pi Core Player
Key Features 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
Specification 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.

Packing List

  • 1 x X450
  • 1 x Installation screw pack


How to use: http://suptronics.com/miniPCkits/x450-software.html

Power Supply

This is single output 24V 10A 250W Switching power supply, and it can provide upto 250W power output.

Generay Specification

Item Description
Model S-250-24
DC output voltage, current 24V, 0~10A
Wave and noise 150mVp-p
Inlet wire stability ±1%
Load stability ±1%
Efficiency 81.50%
Adjustable range for DC voltage ±10%
Input voltage range 90~132VAC / 180~264VAC by Switch
Impact current (Cold start current) 25A/114VAC 50A/230VAC
OverLoad protection 105% ~ 135% cut off the output, automatic recovery
Over voltage protection 115%~150% shut down O/P voltage, re-power on the recovery
Setup, rise, hold up time 200ms, 50ms, 16ms/230vac at full load
Withstand voltage I/P-O/P 1.5kV I/P-FG 1.5kV O/P-FG 0.5kV 1minute
Isolation resistance I/P-O/P I/P-FG O/P-FG 500VDC/100MΩ
Working temperature -10℃ ~ +50℃
Dimension 215 x 115 x 50mm


1. How to use the pin header marked “PWR ON” , “SPK MUTE” and “AMP OFF”?.

  • PWR ON: Short - Auto power on when power applied, Open – Using an external latching switch to control power on/off
  • SPK MUTE: Short – Speaker un-muted, Open – Mute enabled and it is controlled by GPIO22 with additional software setting e.g high = speaker unmuted, Low=speaker muted
  • AMP OFF: Short – speaker in shutdown mode, Open – Speaker in operation mode
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Anonymous user #5

25 months ago
Score 0++
why are there two power inputs?


25 months ago
Score 0++
Hi,6~26V high power, when the load is large, you can use two power supplies to enhance the power supply.

Anonymous user #4

32 months ago
Score 0++
how to uaa the audio input? what software can I use to take this input and push to the speakers?

Anonymous user #3

45 months ago
Score 0++

when I look for DAC in VOLUMIO i don't see any x450 nor subtronic.

what is the correct selection to run this DAC?

Anonymous user #2

46 months ago
Score 0++
is there anyway to control the volume through software mixer (second anonymous user 2

Anonymous user #5

25 months ago
Score 0++
you can always adjust volume through software. this applies to all dacs and all audio solutions. How it is achieved depends on the software.

Anonymous user #1

50 months ago
Score 0++
Is there anyway to control the volume through software