Cayin HA-2A tube headphone amplifier

​This masterpiece combines the unique warmth and smoothness of vintage NOS vacuum tubes with state-of-the-art technology to deliver a stunningly detailed sound with a wide soundstage and excellent musicality. Equipped with a pair of selected Amperex 17BF11 NOS dual pentodes and a matched pair of Amperex ECF82/6U8 NOS for power and voltage amplification as well as an RCA 17AX4GT NOS rectifier tube, the amplifier promises an unparalleled listening experience.

Thanks to the innovative amplifier circuit in single-ended Class A technology, developed by Cayin's engineers, the characteristics of the tubes used are optimally utilized. The multi-stage filtering, the low-noise FET voltage regulation and the specially developed EI output transformer with Z11 core guarantee perfect control of headphone loads and produce a balanced, warm sound with rich harmonic characteristics.

The HA-2A offers three settings (High/Mid/Low) for optimal matching of the headphone outputs to the impedance of the connected headphones, resulting in a high output power of up to 1000 mW per channel. The transformers play a crucial role in the performance of the amplifier, with high quality, wide bandwidth EI transformers designed specifically for the HA-2A. These deliver ample power with high efficiency and extremely low distortion.

Versatile connectivity options, including three headphone jacks (two balanced and one unbalanced) and two analog inputs (XLR and RCA), provide flexibility for a variety of audio devices. All Cayin tube amplifiers are handcrafted using point-to-point wiring, ensuring the shortest signal path and improved detail.

The HA-2A integrates seamlessly with the Cayin i-8 components and enables optical integration with the iDAP-8 Digital Streamer and iDAC-8 DAC to create a compact desktop system. Despite its compact dimensions and a weight of only 10 kg, the HA-2A offers exceptional audio performance and harmonious aesthetics. With extensive metal finishing and resin sealing, the amplifier remains in first-class condition even after intensive use.

A power-on delay circuit minimizes cracking noises on activation and ensures that the tubes are optimally warmed up before music playback begins.