Lehmann Audio Black Cube Linear Headphone Amplifier

Selling my Lehmann Audio Linear headphone amplifier, serial number 05928, that was manufactured in Germany in 2013 (before the "Black Cube" logo was added to the front), and I am the original owner. I used the amplifier for a few months, but then I became obsessed with the idea of running my HiFiMan planar magnetic headphones in balanced mode. I have since purchased multiple balanced headphone amps, falling into the typical audiophile upgrade trap!

This single-ended headphone amp has had numerous excellent reviews:

• Lehmann Black Cube Linear review from What Hi-Fi
  • "...it's as a headphone amplifier that the unit impresses most. As far as sonic performance is concerned, it's the best we've come across."
• Norbert Lehmann's Headphone Amp: A Review in Two Parts from Positive Feedback by Max Dudious and David W. Robinson
• First Impression: Lehmann Black Cube Linear from Headfonia by contributor Mike

The Linear has been kept in storage since about 2017, and is in Excellent condition with no blemishes that I can see. Includes the original box, packaging materials, power cord, manual and assorted product documentation from Lehmann Audio.