I have a non-USB version Benchmark DAC 1 for sale in excellent cosmetic condition. This this a Stereophile Class A rated DAC. It is a 2 channel, 24-bit 192-kHZ Audio Digital-to-Analog Converter. XLR balanced, BNC coaxial, and Toslink optical digital inputs-front panel switchable between source type cable. Balanced and RCA outputs. Two front headphoen jacks. There is a volume control which allows you to use this unit as a digital preamplifier, so you can hook your source directly to this DAC and straight to your amplifier, bypassing the need for a preamp if you so desire. For the money, this is probably the bes DAC you'll find in terms of quality of construction, optional input/output and sound quality.
I have all the original manuals, but can't find the box, but will ship securely. Check out my feedback and buy with confidence.
Any questions, please contact me via email at firstname.lastname@example.org
Thanks for looking!