Ecoute TH2
The headphone's built-in tube is a Korg Nutube 6P1 dual-triode. The Écoute Audio TH2 also features the usual wireless features, such as active noise cancellation, transparency mode, phone call support, and voice assistant compatibility. However, the connectivity options are where it really shines. A full range of lossless digital audio via USB-C, analog 3.5mm jacks (active or passive), and Bluetooth 5.3 (AAC/LDAC) complete the versatile package, with or without a cable.
In the world of high-end headphones, amplification is typically considered an external factor. Even premium designs generally assume a separate headphone amplifier, with solid-state, tube, or hybrid technology, is integrated into the signal chain. A built-in vacuum tube headphone amplifier fundamentally challenges this convention and is exceptionally rare.
Tubes are traditionally associated with full-featured components due to their power consumption, heat generation, physical fragility, and sensitivity to vibration. Integrating a tube amplifier directly into headphones requires overcoming all these limitations while retaining the electrical and sonic properties that make tubes so appealing. This alone places such designs outside the norms of portable or compact headphones. Incidentally, tubes have appeared in portable music players before. So why not in headphones?
From a technical perspective, a built-in tube amplifier allows the signal to be shaped at the earliest possible amplification stage, before it is limited by power amplifiers or external circuits. This differs significantly from digital tube emulation or DSP-based sound shaping, where harmonic behavior is approximated afterward. A true tube amplifier introduces authentic harmonic structure, natural dynamic behavior, and voltage-controlled gain characteristics that cannot be fully replicated digitally.
Just as important is what this conceptually enables: headphones that behave like a complete, self-contained portable hi-fi system rather than a passive transducer. By integrating a true analog tube amplifier into the headphones, the designer has control over the entire signal path—DAC, preamplifier, and output—guaranteeing consistency, intent, and system coherence that would otherwise depend on the choice of external equipment.
The Écoute TH2 is not yet available. If the Kickstarter campaign is successful, the plan is to launch the TH2 sometime in the fall of 2026.
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