ASUS Xonar Essence One - DAC & Headphone Amplifier

Selling my ASUS Xonar Essence One DAC Headphone Amplifier in like new condition. Smoke Free home, conservatively rated at 8/10, and used only a handful of times since I purchased it. 

Unfortunately, I have too many DACs & Headphone amps at the moment and find myself mostly using a portable setup due to travel which is the reason for selling this. 

Unit hardware can be modded / upgraded by replacing or swapping out the individual OP-amps.  

 
Included is the original box + packaging, all documentation (incl User Manual + Test Certificate), Software Driver CD, and all of the originally provided accessory cables (power, USB, balanced audio, etc).  


Payment via Paypal. Shipping is included with my Asking Price.    

 
I also have the following OP-amps (complete with original retail packaging) which i can also sell if there is interest:   

• JRC MUSES01 (2)  
• JRC MUSES8920 (4) 

Xonar Essence One Features:

• Hi-Fi Class audio: up-samples 44.1/88.2 /176.4kHz input to 352.8kHz and 48/96/192kHz input to 384kHz in a symmetrical manner.
• Extreme audio clarity: extremely high SNR (120dB), the Xonar Essence One provides audiophiles clearer sounds with every detail while significantly reducing noise level.
• Built-in headphone amp: integrated audiophile-class headphone AMP circuit which powers up ALL Hi-Fi headphones and grants 100% performance, even with impedance up to 600ohms.
• 11 swappable OP-amps: allows user to swap almost every OP-amps for a fully customized sound.
• Dedicated internal power supply: provides the cleanest power for the cleanest sound with excellent immunity to noise on the AC line.
• Balanced XLR output: This is a higher quality output that is useful for eliminating unwanted noises and interference.
• Bit-perfect with ASIO 2.2 Driver: If you are running bit-perfect with ASIO, you will hear the music as it was encoded on the CD.
• Low Clock Jitter with Asynchronous Data Transfer: Super Low Jitter.
• Dedicated Volume Controls: one for the headphones and another for speakers.
• Toslink and Coaxial S/PDIF inputs: which enable the connection of source components. The digital inputs accept data formats at sample rates up to 192 kHz.

Key specification

• Audio Performance
• Output Signal-to-Noise Ratio (A-Weighted) (Front-out) :120 dB
• Output THD+N at 1kHz (Front-out) :0.000316 %(-110 dB)
• Frequency Response (-3dB, 24bit/192KHz input) :10 Hz to 48 KHz
• Output/Input Full-Scale Voltage :7 Vrms ( Vp-p)
• Bus Compatibility: USB
• Sample Rate and Resolution
• Analog Playback Sample Rate and Resolution : 44.1K/48K/96K/192KHz @ 16bit/24bit
• S/PDIF Digital Input : 44.1K/48K/96K/192KHz @ 16bit/24bit
• ASIO 2.0 Driver Support : Hz @ with very low latency
• Dimensions: 261.33 x 230 x 60.65 mm ( L x W x H )