Description
The Reference Standard for Digital Streaming
The LHY Audio RPI Pro is the flagship evolution of our streaming series, engineered for audiophiles who demand zero compromise. By utilizing the industrial Raspberry Pi Compute Module 4 (CM4) instead of a standard Pi board, we’ve optimized the signal path, removed unnecessary components, and implemented true high-end isolation technologies.
Advanced Engineering Highlights:
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SFP Fiber Optic Input: The RPI Pro features a dedicated SFP port, allowing for a fiber optic network connection. This provides total galvanic isolation from network noise, effectively blocking EMI and RFI from your router or switch.
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Compute Module 4 (CM4) Core: Built on the streamlined CM4 architecture, the RPI Pro offers a more stable and direct data path, significantly reducing electromagnetic interference compared to standard Raspberry Pi boards.
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Ultra-Precision OCXO Clocking: Integrated with a top-tier SC-CUT Oven Controlled Crystal Oscillator, the RPI Pro re-clocks the digital signal to femtosecond precision, delivering a liquid, natural, and highly detailed soundstage.
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Dual-Stage Linear Power Architecture: Equipped with a high-grade Talema transformer and dual independent LT3042 + PNP regulation circuits. The digital processing unit and the clock system are powered separately to prevent cross-contamination of noise.
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Galvanic Isolated Output: The USB audio output is further filtered and isolated to ensure that the "dirty" power of the CPU never reaches your DAC.
Technical Specifications:
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Core Hardware: Raspberry Pi Compute Module 4 (4GB RAM / 32GB eMMC)
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Network Input: SFP Fiber Optic Port + RJ45 Gigabit Ethernet
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Power Supply: 30VA Talema Toroidal Transformer
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Regulation Noise: $< 1uV$ (Dual Independent Rails)
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Internal Clock: High-Stability SC-CUT OCXO
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Clock Input: 10MHz BNC (Supports external synchronization)
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USB Output: Dedicated Low-Noise USB 2.0 (Optimized for DACs)
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OS Support: Roon Ready (RoPieee), Volumio, Moode, HQPlayer NAA.
Technical Specifications/Raw Specs
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Connectivity: SFP (Optical), RJ45, USB-A x2, BNC Clock In
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Clock Frequency: 10MHz / 22.5792MHz / 24.576MHz Internal
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Chassis: Full CNC Aluminum Shielding (Aviation Grade)
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Input Voltage: 115V / 230V Manual Toggle
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Cooling: Passive Silent Cooling (Chassis Heat Sink)
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Dimensions: 220mm x 180mm x 60mm
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Weight: 2.2kg
Specifications
- Weight: 200gr
- Usage: Indoor & outdoor
Pros and cons
- Sustainably produced
- Ideal for everyday use
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The fuse can be replaced bycarefully prying open the fusecompartment.
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1.25 Gbps SFP fiber module slot
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HDMl video output interface.Can be connected to a display to view system status.
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1.0 Gbps Ethernet port
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Accepts a 50Q 10MHz externalclock signal
Purity in Audio, Flexibility in Connection.
Core Powered by Raspberry Pi Compute Module 4
Powered by the Raspberry Pi Compute Module 4, the RPI Pro is built for pure audio excellence. With Ropieee pre-installed, it offers exceptional sound and an intuitive user experience.
Stream directly from your smartphone to your DAC—no Roon Core needed. Experience audio that outperforms Bluetooth and lets your music truly shine.
Flexible Audio OS Choices:
- 2x TF Cards Included:Ready-to-use with Ropieee or moode.
- Easy Switch:Simply swap the TF card to change the system.
Built-in Ropieee Software Support:
Built-in High-Precision Clock System
Ultra-Low Phase Noise
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.
Native & Isolated USB Output
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.
Precision-Designed DC Power Supply
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.
Technical Specifications
| Category | Details |
|---|---|
| Specification | Parameters |
| Hardware | Raspberry Pi Compute Module 4 High Speed MicroSD TF 64G OXCO+ PLL Clock |
| Software | Pre-installed Ropieee + Moode OS | Volumio & PiCorePlayer support available on request |
| Built-in OCXO | Phase noise: -100dBc @ 1Hz offset (typ.) Frequency stability: ±0.3ppb Frequency accuracy: ±1ppm |
| Clock Input | BNC x1 (10MHz@50 ohms sine/square wave, 7-14dBm/0.5-1Vrms) |
| Isolated USB 2.0 Audio | PCM: 44.1KHz–768KHz/32Bit DSD: DSD64/128/256/512 (Native) |
| Network Interfaces | RJ45: Auto-negotiating 10/100/1000Mbps SFP: Supports copper/fiber modules, auto-negotiating 10/100/1000Mbps Note: RJ45 and SFP cannot be connected to the same LAN simultaneously |
| Ground Lift Switch | UP: Disconnects AC ground DOWN: Connects AC ground |
| Grounding Terminal | For dedicated external grounding |
| Power Consumption | Standby: 18W Operation: 32W |
| Chassis Type | Solid Aluminum Alloy Machining |
| Dimensions | 275 × 240 × 50mm (Width × Depth × Height) |
| Tuning | - |
| Weight | 5.5kg |
| Fuse | 5×20 mm, T2.0AL (110–120VAC) 5×20 mm, T1.0AL (220–240VAC) |
| Voltage | 110V-120V / 220V-240V |
| Accessories | Power cord, TF card ×2 ,Cat.6 Ethernet cable, Gloves |