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Rhein Z1

Music Server of Craftmanship

Focus on extracting and purifying the essence of music

Feel the essence of digital music, let the music fully restore the live effect and make you be on the scene!

Custom Built Motherboard for Audio

Customized and dedicated motherboard for audio usage. Low noise for  high quality music playback, shortest data path make the smoother and more pure data transmission possible. It consumes less power and introduces less noise on power rails to ensure more stable USB and network signals. The independent USB AUDIO dedicated circuit makes USB AUDIO processing isolated and gets less interference. As a result, data transmission is more stable, and jitter during data transmission is reduced.

Ultra Low CPU Power Consumption

The intel mobile series CPU consumes ultra low power consumption (as low as 6W) to reduce electrical noise from CPU and make the signal inside Rhein Z1 to be more stable and prevent from affecting audio device nearby.

Over Designed Power board

Customized and over-designed power board, which is capable of 160W output while Rhein Z1 only requires 40W, provides sufficient power to the motherboard and SSD and ensures stable data transmission.

High Quality Chassis made of Aerospace Industrial Grade Aluminum Alloy with CNC Processing

Compact and ingenious industrial design make Rhein Z1 an artwork. Fan-less design makes no mechanical noise. Rhein Z1 appearance obtained Chinese patent certification.

Patented Structure Design

The groove structure design has the feature of reducing signal interference, standardizing the line direction and placement. The design has obtained Chinese patent certification.

Patent Certificate Of China 

Audio Grade SSD Technology V2

The new internal storage board design provides pure SSD power, greatly reducing the transmission distance of SATA signals only 2CM (previous version is
18cm), supporting dual SSD, while using Low power consumption M.2 SATA SSD: Lower the electrical noise on power rail inside Z1, added EMI absorber to reduce M.2 SATA SSD EMI noise

Brand new CPU thermal solution

Use the aluminum alloy upper case as the CPU heatsink. Lower CPU temperature while operating: 10 Degree C lower than previous version ,Lower internal temperature results in 15% lower thermal noise inside the Rhein Z1 than previous version (in 25 degree C room temperature)

High Permeability EMI Absorber

Furthermore, to eliminate high frequency electrical noise from digital circuits, Rhein Z1 uses specially chosen EMI absorber at the inner side of bottom case to absorb EMI noise from internal digital circuit including DRAM, CPU, …, and so on.

Efficient VitOS Operating System

The Rhein Z1 features a VitOS operating system designed for music servers that focuses on streaming services. VitOS improves machine efficiency, performance stability and network latency issues.

VitOS Block Diagram
VitOS: An operating system specially built for music server.

1. Dual Firmware: Prevent from being damaged while firmware upgrade.

2. Network accelator: Accelerated network processing

3. USB Audio Optimizer: Optimized USB Audio processing

4. Task Manager: High efficiency task management

5. Application Manager: Able to expand more and more application.

6. System Manager: Event-trigger design gets lowest system loading.

Mobile app for VitOS: VitOS Manager Features

1. Discover Rhein Z1 and adjust the network settings of Rhein Z1
2. Install and manage Roon Server in Rhein Z1.
3. Control the music importer, which imports music from the USB hard drive to the data disk in Rhein Z1 and view the music import details and result.
4. Update the firmware of Rhein Z1.

VitOS Music Server
Performance Comparison

Gigabit Ethernet

tcpdump version 4.9.2

libpcap version 1.9.0-PRE-GIT (with TPACKET_V3)

OpenSSL 1.1.1b  26 Feb 2019

Average Latency: VitOS average latency is the same as ROCK, and lower then Mac mini for 23.72%
Max. Latency: VitOS max. latency is lower then ROCK for  5.21 %,and lower then Mac mini for 8.65 %
Standard deviation of latency: VitOS is lower then ROCK for 7.69 %, and lower then Mac mini for 11.11 %
Variation of latency: VitOS is lower then ROCK for 14.29 %, and lower then Mac mini for  25 %

Test topology:

Test method: Play the same music track, captures network packets on Roon player and analyze the latency of response packets to and from Roon server. Then analyze the Roon server response packet latency and compare the result between different systems.

Lower latency implies better music server performance.

Test track:

Filename: 03.Mr.Blues.flac
Format: FLAC 176.4 KHz / 24bits
Album:I Love You
Track duration: 4 minutes 40 seconds
File size: 138 MiB

Network packet capture software:

Enhanced Spotify Music Experience 
with Rhein Z1 + Spotify Connect

  • Simplified and direct music streaming path

  • Rhein Z1 directly connects to Spotify streaming server when playing back music.

  • Uses smartphone with Spotify app as a remote controller. 

  • Rhein Z1 continues to playback Spotify music even when smartphone are power off. 

  • When the Spotify Connect is playing music, smartphone can still control the music playback even when smartphone is not at home network.

Your Hi-Fi Spot
Reveals Huge Information in the Spotify Music


1. Specially designed operating system: VitOS
2. 250 GB Silent Angel Customized SSD for System Disk.
    1 TB / 2 TB Silent Angel Customized SSD for Data Disk (optional).
3. Up to 2 simultaneous zones for multi-room streaming applications.

4.High quality and thick aluminum alloy chassis.
5. Ultra low power consumption SSD and isolated power circuit design inside the SSD to ensure low electrical noise emission from SSD.
6. Low power consumption CPU to reduce the electrical noise emission from CPU.
7. Customized Silent Angel Noise Absorber (SANA) inside.
8. High quality SATA cable for more stable SSD data transmission. 
9. OFC (Oxygen-Free Copper) SATA power cable for better power feeding to SSD. 

10.USB 2.0 and USB 3.0 ports for external storage expansion. 

11.USB Audio port for USB DAC connection. 

12.For engineer test only, DO NOT USE: HDMI

13.Fan-less design.

Product parameters


Data Disk:  

black, silver; (requires other colors can be customized)

Rhein Z1 Standard version has 250GB system sisk for system usage only. You can choose Rhein Z1 NAS version, which has an additional 1TB or 2TB SSD Data Disk.

Power Inlet: 


12V DC @ 3A max. (Spec. 5.5mm x 2.5mm, tip carries +12V)

USB Audio X 1; USB 3.0 X 1; USB 2.0 x 2; Gigabit Network X1
HDMI X 1 (service interface); power connector X 1



DSD Support:

200x200x65 (mm)

6 KG ( Gross Weight )

Please noted that DAC supports DSD with "DSD Native" is required for you to play DSD music up to DSD256 smoothly. If your DAC supports DSD with "DoP" (DSD over PCM) mode, then the Rhein Z1 only support DSD music up to DSD64 (which means DSD128 or DSD256 is not supported in DoP mode).

Silent Angel Rhein Z1 is a platform, which includes our proprietary hardware and our audio-grade Operating System (VitOS), both designed and manufactured by Thunder Data Co. It allows customers to install 3rd party applications of their choice (They pay the vendor directly) . Thunder Data also provides an SDK to assist porting of 3rd party applications to Z1. Please contact support@thunder-data.com for more information. 

Download Rhein Z1 Product Information

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