As I wrap up the day and get ready to head for the martini shaker I am doing some critical listening using TP-012
Be Altitude/Respect Yourself, out of the RCA outputs of my Nagra T/ Tube Repro, and into our new Bottlehead Crack OTL headphone amp prototype, with a pair of Sennheiser HD600 headphones with a Cardas cable.

This little headphone amp is not quite up to my big monster $10K headphone amp, giving up a bit of midrange magic, but it's not so far off that I'm missing it that badly. I mean baby, it's MAVIS singing. We've been experimenting with upgrades - C4S active loads on the tubes and we just replaced the stock Panasonic 100uF electrolytic output capacitors with a couple of bigass Dayton metallized polypropylene caps that are each about the size of the 6080 tube. They just barely fit under the hood.
Nice way to wrap up a workday.