RPI Pro | Pro Series Raspberry Pi Streamer & Bridge

1. Raspberry Pi CM4-Based Architecture​

RPI Pro utilizes the Raspberry Pi Compute Module 4 (CM4), delivering native USB output without PCIe conversion, reducing signal loss and interference. Compatible with popular systems like Volumio, Ropieee, Moode, and PiCorePlayer. Pre-installed with Ropieee for easy setup—stream directly from your phone to your DAC with superior quality compared to Bluetooth.

​2. High-Precision Clock System​

• Equipped with an ultra-low phase-noise SC-cut OCXO (-100dBc/1Hz typ.) as the master clock reference.
  
• Skyworks Si5381 PLL generates synchronized clock signals for the CM4, network controller, and USB interface.
  
• Features a 10MHz external clock input (BNC) for advanced reference clock integration, with automatic switching.
  

​3. Native USB Output with Isolation​

USB 2.0 port is directly driven by the CM4 CPU, bypassing conversion chips. Enhanced with a high-speed isolation IC (3165) and dedicated power supply for studio-grade audio transmission. Ensures stable playback of high-resolution PCM and DSD files, delivering uncompromising fidelity.

​4. High-Performance Network Control​

Dual RJ45 and SFP ports enable fiber-optic network isolation, significantly reducing electrical noise and improving signal integrity.

​5. Precision DC Power Supply​

• 30VA toroidal transformer with EMI filtering.
  
• High-speed rectification and multi-stage filtering with premium electrolytic capacitors.
  
• Three independent DC-DC power circuits optimized for high-speed digital performance and microvolt-level low noise.
  

Built-in Ropieee Software Support:​​

• HQPlayer NAA
  
• Roon Bridge
  
• UPNP
  
• Spotify Connect
  
• Tidal Connect
  
• Airplay (for Apple device streaming)
  
• Squeezelite (for Daphile/Daphile systems)

Product Link: https://www.lhy-audio.com/products/rpi-pro/