giesemann reference sfp optical isolator pa1 on sale

Roon Music Server

AfterDark. Project ClayX Giesemann KARMANN Server x HANDHARTILO Emperor Crown SERIES

Giesemann Emperor Crown Limitied Edition included:
10M Master Clock Input
Music Storage Capacity (SSD)

The Giesemann KARMANN Server - HANDHARTILO Emperor Crown Limited Edition 


This version is equipped the high performance with low powered TDP CPU from Intel. We have managed deal with the large vendor to have access for this special CPU to build the new Music Server for Audiophile.  

This version of Intel CPU 13th generation is a breakthrough with 10nm specifications, the latest technologies can ensure the Music Server running at moderate heat, running fan-less to performs most of the complex instruction and upsampling calculation for HQplayer. 


To ensure we have the best sounding for the hardwares, we performs a lot of trial and errors and research effort since 2021. AfterDark. are ambition to build something very unique in the market for Music Server. Therefore, we start to look into the motherboards and card and tried to design a tailor made chassis for music server for audiophile. 




We are always innovative to design some of the very best Audiophile products which is technologies ahead to others. We believed it is worth to invest the new R&D teams to invent a new Giesemann Clock Sync Module (GCSM) to generate the best clocking signal to the motherboard for the heart of Intel PCH chipset, which is critical to generates all the reference clock for CPU, PCIe, DMI, I/O and TSC. The GCSM is designed to achieved the highest quality of clocking performance for all the components to the motherboard and PCIe cards. 



AfterDark. Giesemann Clock Sync Module (GCSM) 




The standard Intel Raptor Lake platform has a 38.4MHz crystal as a reference clock to the PCH. The PCH then generates three clocks:


  • 38.4 MHz reference clock for the CPU internal clock generator
  • 100MHz PCIBCLK for PCIe, DMI, and I/O
  • 24MHz frequency for TSC, display, and SVID controller


When connecting with the Giesemann External Reference Master Clock 10M input. The Giesemann Clock Sync Modules (GCSM) will generate the Reference Clock Signal at 38.4Mhz for the Intel PCH Chipset (PLL), the above graph shows how important this 38.4Mhz is. This single frequency will provide the reference point for all the process at the CPU, PCIe, DMI, I/O, All cores, and RAM frequencies will take into account. 


In additional, the onboard build in LAN & USB as well as USB and SFP Card will be OCXO optimised by GCSM. 


The KARMANN Server - Emperor Double Crown version will be build with Intel 13th generation Low TDP CPU with 14 core and 64GB DDR5 4800Mhz RAM industrial custom modules for lowest latency and digitial signal transfer.


Selection of Audiophile Motherboard and tweaks with Audio Components


We choose the Industrial Motherboard after we listen with it carefully at the system. It is always good to apply some EMI Shielding for the power section for the RAM and this is significant improvement for  sounding. We selected to use the lowest latency of DDR5 RAM. As a result, the sound is much smoother and provide darker background. 


The BIOS will be tweaked with CPU under clocking and Memory under clocking, we always keep the electronic to be run in under clock and maintains moderate heat for CPU and Memory. This keep the music server in optimial sound quality and impoves harmonic sonics and were able to tweaks in BIOS levels on motherboard.


The FROLYT bipolar Capacitor will be applied on Giesemann Clock Sync Modules for soung optimisation. This special tweak help us to improvement the clock signal much smoother to all cards and motherboard. 


High performance Pressive heatsink with latest Graphene Technologies 


Thermal transport in graphene is 14 times compared to thermal conductivity in copper, the server temperature will be much lower with high performance heat transfer from CPU. 



High performance Heatsink with Graphene Tech. 



The heat from CPU and motherboard will be transfer via the top of the Carbon Fiber Top plate. 


What is special on KARMANN - Emperor Crown?

  • Windows 11 OS is pre-installed in the seperate 1.0TB M.2 industrial grade SSD to reduce time latency and fastest performance in indexing for Roon Server application
  • Addtional Music Storage can be made to order. The Samsung SSD will be used to storage on master grade music files, the SSD can provide more smoother sounding and no noise when comparing HDD. 
  • AfterDark. Giesemann Clock Sync (GCS) 10M Master Clock modules is pre-installed to provide the best clock signal to the motherboard, and PCIe card, to ensure all music is transfer in lowest time latency. 
  • SFP Card is build in the music server and the SFP modules can be connect directly to NETone Switch to provide physical isolation from server to switch. 
  • Fanless designed on all modules with no noise 
  • All BIOS is heavily tweaks and sound tuning software including the Fidelizer Pro is full licensed and tuned by AfterDark which improve music playback in more organic ways. 
  • With the helps of heavily downsized OS with much less process, the music server can boots up in just 4 seconds. 
  • Full ATX motherboard for more flexible and mutliple card can be installed. 
  • Build in power supply 
  • Plug and Play for music lover. 


KARMANN Server will be the very first Music Server in the market which is build in SFP Fiber NIC Adaptor with OCXO clock build inside for motherboard. 






AfterDark. Giesemann Reference SFP Optical Network Card PA6 - Network Sweeter 



  • Fanless design, No Noise, Carbon Fiber Panel (Top, Front and Back) 
  • Build in Giesemann OCXO clock - Grade Prince (Optional) for Giesemann USB / SFP / Motherboard 
  • Windows 11 OS is heavily optimised with Fidelizer Pro 8.10 and MinorityClean preinstalled 
  • Up to Samsung 8TB SSD as storage can be installed. 
  • Samsung 15.6' OLED Panel - AfterDark. Portable Screen for display music album (Optional) 
  • AfterDark. Diretta Host / Roon Server preinstalled in Windows 11 Professional







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 Music Server. The will prevent external noise from getting to the Lan Port, 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 Optical SFP Performance Modules, this SFP modules is recommended to with Finisar Industrial Grade 1G 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 optical. The Linear Power Supply is 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 Cable will be used for internal DC power wire.
  • Extra anti EMI-absorber material was placed on the RAM Slot, to eliminate the signal noise and better separation to avoid EMI interference for mission critical Audiophile Music Server application.


  • The “Carbonized Screw” was used to fix the position on Black Modernize Carbon Fiber Anti-Resonance Plate for Audiophile Music Server.
  • 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  : Intel 13th generations 14 cores CPU / Low TDP Special Edition 

Ram  : 64GB DDR5 4800Mhz custom industrial module with EMI Shielding Material  (Standard Included) 

System  : Custom Audio Optimized Windows-based 11 OS, Fully tweaked BIOS, Ultralow Jitter and Ultra low latency

Audio Output  : USB

Storage  : Industrial M.2 SSD 1TB (Read: 7450MB/s Write: 6900MB/s) with Windows 11 OS, Music Storage up to 8TB Samsung SSD can be installed. 

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

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

Connections  : External connections consist of 1 HDMI, 1 Display Port with 4K. UHD supports, 4 USB ports, 1 LAN ports on board and 2 SFP ports at 1G Connection  

Power Input :20A IEC

Color Options  : Silver and Black 

Dimensions  : 430 × 360 × 90mm (W x D x H)

Weight  : Around 10kg



    Type: Roon

    Related Items

    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