xDuoo TA-26s.
A 6N8P + 6N5P OTL tube circuit delivers warm, spacious sound for high-impedance classics like the HD 600.
The Verdict.
Gavler Meta-Score
“The TA-26s is the affordable gateway to tube audio that many audiophiles wish had existed when they started the hobby. The warm, spacious sound with high-impedance headphones like the HD 600 is the pairing that converts measurement-focused listeners into tube believers. At $249, it is the cheapest proper tube amplifier worth recommending.”
The Gavler Verdict
Precision Engineering
6N8P + 6N5P Tube Circuit
Classic 6N8P driver / 6N5P power pairing (Western 6SN7/6AS7 equivalents) produces warm, harmonically rich, airy sound solid-state amps cannot replicate.
Tube Rolling Compatible
Standard sockets accept 6SN7, 6AS7, and 6080 tube variants for customizable sonic character that evolves with your taste.
OTL Design + 4.4mm Balanced Out
True output-transformerless tube topology tuned for high-impedance cans, now with a 4.4mm balanced output added alongside the 6.35mm jack.
Technical Specifications
The Scoreboard
Tube enthusiasts rate the TA-26s exceptionally highly for its price-to-tube-magic ratio. Objectivists note the OTL design is a poor match for low-impedance headphones and IEMs (xDuoo recommends staying above 100Ω) and that the measurements are mediocre — but tube lovers do not buy tubes for measurements.
Cast Your Vote
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Best Price Availability.
Prices checked April 2026
Price History
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Global Critique
“It offers excellent output levels of power and voltage, rated at 500mW into 600/300Ω, so HD800/600 Series users should take note. It can drive power-hungry headphones fairly well.”
“It looks like a little beast and it really is very well-rounded for the price. Can't go wrong here in terms of value to performance.”
“The most untube of tube amps — surprisingly quiet and clean, with that tube airiness intact.”
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