giesemann reference sfp optical isolator pa1 on sale

Roon Music Server

AfterDark. Project ClayX Giesemann KARMANN Mini Server

Emperor Signature included:
10M Master Clock Input

The Giesemann KARMANN MINI Server - Grade Emperor Signature 

The development of Giesemann KARMANN Music Server is built with the the mind of Audiophiles, who pursue the best possible sounds with the fully optimised OS. 

The KARMANN Mini is build with Intel CPU with 4 core and 16GB RAM industrial custom modules for lowest latency and digitial signal transfer.  

KARMANN Mini Server will be the very first Music Server in the market which is build in SFP Fiber NIC Adaptor with OCXO clock build inside to enhance the network performance for SFP module and SFP Active Copper Connections.


At the top: SFP ports is OCXO Optimised with Finisar for digital music enhancements


  • Fanless design, No Noise, Carbon Fiber Panel 
  • Build in Giesemann OCXO clock - Grade Prince for Giesemann S1 DUAL SFP NIC + OCXO optimised for dual Lan Ports / USB ports on the motherboard. 
  • Windows OS is heavily optimised with Fidelizer Pro 8.10 and MinorityClean preinstalled on M.2 512GB SSD 
  • Samsung 2TB SSD as storage for standard configuration , Up to 8TB 
  • Samsung 15.6' OLED Panel - AfterDark. Portable Screen for display music album (Optional) 
  • AfterDark. Diretta Host / Roon Server preinstalled in Windows 11 Professional
  • AfterDark. LPS Power Supply 12V  is recommended and sold separately.




The Karmann Mini Server will be power by external 12V LPS. 

Modules Specification:

  • Black Modernize Carbon Fiber Anti-Resonance Plate is made of 6mm front / 3mm back thickness of Carbon Fiber Audiophile MAT for EMI shielding and Anti-Resonance for mission critical application for Audiophile Network Switch. The will prevent external noise from getting to the USB signal conductors, and the high performance density of Carbon Fiber Shield to further prevent the ingress of noise (RFI, etc.) and increase stabilization during Roon streaming application.
  • Black Modernize Connection Interface Upgrade provide maximum flexibility and enhance Noise Isolated performance with propriety “LAN input for Audio” and “Optical Lan Isolator” for audiophile audio connection.
  • Black Constellation (CFS) Optical Fiber Audio Lan Isolator Performance Modules, this Lan Isolator interface is upgraded with 1G SFP Finisar Industrial Grade Optical Module and Commercial Grade Commscope Single Mode  Optical Fiber Cable to provide the best data transfer with much “less error rate” to provide the best audio performance for Lan Isolation application. The separate Linear Power Supplywas used to provide the best audio performance with less signal to noise background. The micro details and soundstage on Hi-Res Audio will improves significantly.
  • Project ClayX  Duelund Silver Cable will be used for internal DC power wire.
  • Black Modernize Linear Power Supply is recommended to eliminate the EMI interference and provide more stable audiophile grade power supply for audiophile music server. (Optional)
  • Extra anti EMI-absorber material was placed on the connection board, to eliminate the signal noise and better separation to avoid vibration interference for mission critical Audiophile Network Switch application.
  • The “Carbonized Screw” was used to fix the position on Black Modernize Carbon Fiber Anti-Resonance Plate for Audiophile NAS.
  • All hand made by AfterDark.

Chassis  : Fanless design, 3mm Aluminum polished chassis,  completely passive cooled for silent operation improving resonance control and heat dissipation  

CPU  : 4 core CPU

Ram  : 16GB custom industrial module with Oyaide Noise Reduction Fabric EMI Shielding Material  

System  : Custom Audio Optimized Windows-based OS, Fully tweaked BIOS, Ultralow Jitter and very low latency

Audio Output  : USB

Storage  : Industrial M.2 SSD 512GB with Windows 11 OS, Music SSD storage Up to 8TB 

Audio Formats supported  : WAV, AIFF, FLAC, ALAC, AAC, MP3, DSD, MQA supported audio formats

Software Compatibility  : Roon, HQplayer, Audirvana, JRiver, JPlay

Connections  : External connections consist of 2 USB ports, 2 LAN ports on board. 2 SFP 1G Connection  

Power Input : 12V DC 2.5mm Jack

Power Supply  : 12V LPS is required (Sold Separately) 

Remote Access  : Remote setup and maintenance

Color Options  : Silver and Black 

Dimensions  : 230 × 308 × 90mm (W x D x H)

Weight  : Around 5kg


    Type: Roon

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    Let's celebrate!

    AfterDark. is delighted to have successful shows at HighEnd Munich 2024.🙂

    Please feel free to share the discount code with friends.We love to hear more music lover to enjoy this great product. 

    Discount code: PA1