Z1 轮播图1.jpg
Silent Angel 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!

The Rhine river belongs to six countries (Switzerland, Liechtenstein, Austria, France, German and Netherland). However, here, Z1 is only for you! 

Z1 is an entry-lux music server for audiophile. The afflatus of Z1 are from the Rhine river. The intention of Z1 is to keep the intactness of music and reappear the live scene. 

Z1 is qualified for processing any type of music regardless of how intricate the streaming data is. If you are seeking bustle but miss a live concert, no worry, Z1 can restore the scene submerging you by the noise. If you are seeking tranquility after a darg, Z1 can bring mild and quiet music, like the water of Rhine tenderly encircling you to flush the all day’s tiredness away. Z1 is more like a conscientious steward not only a music server. From morning to night, spring to winter, enthusiastic to quiet and occidental to oriental, Z1 is always stand by to present the tailored music for you precisely, intactly and quickly. 

If you are curious about Z1, please browse below to explore the mystery of extracting and purifying the essential music of Z1.

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 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 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 Z1 an artwork. Fan-less design makes no mechanical noise. 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 Z1 than previous version (in 25 degree C room temperature)

High Permeability EMI Absorber

Furthermore, to eliminate high frequency electrical noise from digital circuits, 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 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 Z1 and adjust the network settings of Z1
2. Install and manage Roon Server in Z1.
3. Control the music importer, which imports music from the USB hard drive to the data disk in Z1 and view the music import details and result.
4. Update the firmware of 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 Z1 + Spotify Connect

  • Simplified and direct music streaming path

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

  • Uses smartphone with Spotify app as a remote controller. 

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

9.USB Audio port for USB DAC connection. 

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

11.Fan-less design.

Product parameters


Data Disk:  

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

Z1 Standard version has 250GB system sisk for system usage only. You can choose 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


200x200x65 (mm)


6 KG ( Gross Weight )

DSD Support:

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 Z1 only support DSD music up to DSD64 (which means DSD128 or DSD256 is not supported in DoP mode).

Number of music:

Z1 is designed to handle 100,000 songs or 4TB music files smoothly.

DSP Ability:

All DSP functions available in the PCM domain including upsampling. And the transcode ability is to transcode from DSD256 to 384Khz PCM.

Important notice:

Because of MinimServer 0.8 license change (see MinimServer web site: https://minimserver.com), newly installation MinimServer on Z1 will not be able to work. Existing installation of MinimServer can continue to use with some limitation.

Silent Angel 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. 

Use Silent Angel Z1 in Various Scenarios

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Download Z1 Product Information

Z1 Applications Guides