Hello, I would like to sell my used headphone amplifier. It has TXCO Clock upgrade from factory.Compatibility with drivers on Windows 10. Win 11 not compatible. SHIPPING TO EU ONLY. You can see a review for example here: https://www.head-fi.org/showcase/audio-gd-nfb-15-1.14507/reviewsIt was a great selling device, lots of good reviews, was working great, I have used it with Sennheiser HD600 with great success. Main Features: DAC Chips:2× Wolfson WM8741 USB Interface:VIA VT1731 with asynchronous transfer support Supported Sample Rates:USB: Up to 192 kHz / 24-bitCoaxial Input: Up to 192 kHz / 24-bitOptical Input: Up to 96 kHz / 24-bit Inputs:USBCoaxial S/PDIFOptical S/PDIF Outputs:Headphone outputFixed-level RCA analog outputVariable-level RCA analog output (Preamp function) Headphone Amplifier Output Power:3500 mW @ 25 ?1800 mW @ 50 ?900 mW @ 100 ?300 mW @ 300 ?150 mW @ 600 ? Output Impedance:2 ? (both headphone and DAC outputs) Frequency Response:20 Hz – 20 kHz (-0.2 dB) Signal-to-Noise Ratio (SNR):118 dB Power Consumption:11 W Weight:2 kg

I have a replacement fiio dac which does me fine, so selling this - it was a bit of an overkill.in excellent working condition AUDIO-GD NFB-15 .32 with power supply, usb cable to connec to computer and coaxial cable.this device can also be connected via optical which is greati had these set up with my yamaha hs7 summary website: http://www.audio-gd.com/Pro/Headphoneamp/NFB1532/NFB15.32EN.htmSummarize Fully discrete analog stages without any OPA and couple caps in the signal channels. Non- feedback ACSS analog output stage . Total of 6 groups dedicated power circuits are used to purify the power supply. Applies a custom order ALPS 27 volume pot for reducing channel imbalance and improving on sound quality. 3 channels digital input : coaxial / Optical / USB DAC output : RCA (User can setting with either variable level as DAC with preamp combo or fixed output level as dedicated DAC ) Headphone output : 6.3MM SE Supports 2X , 4X and 8X oversampling customers setting High-End grade parts built in , ALPS 27 volume pot , Toshiba optical receiver and transistors , gold plate pure copper RCA sockets ect.