The renowned Benchmark DAC1 digital to analog converter. This has a volume control knob and makes a very nice preamplifier for those with only digital sources. The DAC1 features the HPA2 high current headphone power amplifier and 2 headphone jacks. The volume control pot was replaced directly by Benchmark in 2017. I can provide a copy of the receipt for the interested buyer. Works great! Cosmetically in great condition with one exception: the volume knob black anodizing has faded over time and now has a golden hue. Benchmark still sells replacement knobs for ~$7 if this bothers you. This unit does not support USB input. I have used the DAC1 to directly drive a power amplifier and as a compact headphone amplifier. I've upgraded and it's time to let this one go.
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When I sent the unit to Benchmark for service, they returned it in nice new factory packaging.
AC Power Cord
RCA to BNC adapter
DAC1 Owner's Manual