SainSmart SX400 Expansion Board
Best reliable expansion module for budget conscious hardware enthusiasts.
This board turns a bare-bones computer into a serious audio hub without the usual mess of external DACs and amps. By handling audio processing directly on the hardware, it frees up your CPU for smoother performance, though you sacrifice the flexibility of a modular, cable-heavy setup for this streamlined, stackable convenience.
$34.99
Who it's for
- Raspberry Pi hobbyists seeking a plug-and-play expansion solution
- Makers building complex systems with multiple peripheral requirements
- Engineers needing a dependable board for consistent hardware testing
Who should skip it
- Inexperienced users who require step-by-step instructional support
- Builders working within tight physical enclosures or compact spaces
- Advanced developers stacking multiple high-demand HATs or modules
Performance breakdown
Audio Fidelity
The 32-bit DAC delivers crisp, audiophile-grade sound for demanding listeners.
Amplification Power
Class-D output drives bookshelf speakers with surprising authority and clarity.
Installation Simplicity
Stackable HAT design eliminates messy wiring and complex soldering requirements.
CPU Efficiency
I2S interface offloads audio processing, keeping your system responsive.
Connectivity Versatility
Offers essential ports, though lacks modern digital inputs like optical.
Control Integration
Integrated IR sensor makes remote-controlled media setups incredibly straightforward.
Key Specs
Input Voltage
6V to 24Vdc
Output Voltage
5V, 3A
Audio DAC
TI PCM5122 32-bit/384kHz
Audio Amplifier
TI TPA3118D2 Class-D stereo
Headphone Amplifier
TI TPA6133A
Audio Performance
112db SNR, 0.0019% THD
Connectivity Protocol
I2S
Integrated Sensors
IR sensor (38KHz)
Form Factor
Raspberry Pi HAT
Compatibility
Raspberry Pi Model B+, Raspberry Pi 2 Model B
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