LHY RPI Pro Music Streamer & Bridge

Designed for the discerning listener, the LHY RPI Pro represents a masterclass in digital audio transport architecture. The Raspberry Pi Compute Module 4 foundation provides powerful, interference-resistant processing capabilities. Precision timing is maintained through a -100dBc SC-cut OCXO oscillator, while the Skyworks Si5381 phase-locked loop ensures unwavering signal coherence. SFP optical isolation technology effectively eliminates network-induced jitter and noise contamination. Direct USB 2.0 connectivity bypasses conversion stages, preserving sonic fidelity, while segregated power supplies with comprehensive EMI suppression deliver pristine voltage rails. Full compatibility with DSD 512 native and PCM formats, enhanced by optional 10MHz master clock synchronization for reference-grade performance.

The LHY RPI Pro combines cutting-edge engineering with meticulous attention to audio purity. At its core lies the Compute Module 4, delivering robust processing with minimal electromagnetic interference. A -100dBc SC-cut OCXO oscillator ensures exceptional timing precision, while the Skyworks Si5381 phase-locked loop maintains phase coherence throughout the signal chain. Optical isolation via SFP technology purifies network signals, eliminating digital noise. Native USB 2.0 output preserves signal integrity without conversion artifacts, complemented by independent multi-channel power supplies with advanced EMI filtering. Supports DSD 512 native and PCM formats, with optional 10MHz master clock input for ultimate synchronization control.

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.

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.
  

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.

High-Performance Network Control

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

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.

Features

• Roon-Ready Streaming Transport with built-in Linear Power Supply
• The pre-installed Ropieee system supports the following features:
  • HQPlayer NAA
  • Roon Bridge
  • UPNP
  • Airplay
  • Squeezelite
• Ultra-Low Noise OCXO: Uses a high-precision SC-cut OCXO (Typ. 100dBc@1Hz) as the master clock
• Synchronized Clocks: A Skyworks PLL chip generates multiple synchronized clocks for the CM4, network, and USB chips
• 10MHz External Clock Input: Features a BNC input for connecting an external master clock, with automatic switching
• Direct from the CPU: The USB audio signal comes natively from the CM4, ensuring a pure, unconverted data path.
• Galvanic Isolation: A dedicated 3165 chip isolates the USB port, eliminating electrical noise from the source.
• Studio-Quality Playback: Achieve flawless, stable transmission of high-res PCM/DSD for a true zero-compromise audio experience.
• High-Current Toroidal Transformer: 30VA Talema core with multi-stage EMI filtering.
• Advanced Matrix Filtering: Combines high-speed rectification with premium large-capacity capacitors.
• Three Independent Low-Noise Rails: Dedicated μV-level DC-DC circuits for high-speed digital demands.

Specifications

In the Box

• LHY RPI Pro
• Generic Power Cord
• TF Card x 2
• CAT6 Ethernet Cable
• Gloves

Support

• Manual

About

LHY Audio has built a reputation among audiophiles for high-end, audiophile-grade components and accessories for home audio systems. A subsidiary of Jay's Audio, the company focuses on designing and manufacturing precision-engineered solutions aimed at improving the sound quality of digital audio systems. LHY Audio's products are extremely popular with discerning audio enthusiasts and DIY hobbyists who are looking to upgrade their digital audio experience.