I’ve been fortunate to listen to many excellent sounding tube amplifiers and to my ears the 211 is as impressive as anything else I've experienced in my space. The voices and instruments sounded very tangible, with high level of timbre purity. Music of all kinds flowed with effortless liquidity. It was full and warmhearted and, at the same time, convincing by virtue of its dynamic authority, resolution, and superb integration.

The midrange was exceptionally open, revealing, and colorful. The treble was very extended, reproduced cleanly and with an airy high-frequency extension, which was delicately sweet. With this strong inner purity, it conveyed music with liveliness and speed, but with no hardness or compression. It sounded rich and sweet, with no attendant loss of speed or sparkle in the treble.