Cayin C9 Portable Headphone Amplifier
 
The Cayin HA-3A Headphone Amplifier is a high-end, handcrafted device designed for audiophiles who seek the perfect blend of classic tube sound and modern engineering. Featuring dual JJ 6V6S or EH 6V6 output tubes and dual JJ 12AU7 (ECC82) driver tubes, this amplifier delivers rich, warm audio quality that tube enthusiasts crave. The RCA 22DE4 or RCA 25AX4GT serves as the rectifier tube, ensuring clean and stable power to the amplification circuit.
 
The HA-3A offers three levels of headphone impedance settings—Low, Medium, and High—catering to a wide range of headphones. It also provides three headphone output ports: 6.35mm single-ended, 4.4mm balanced, and 4-pin XLR balanced, allowing for versatile connectivity. Dual input ports, including XLR balanced and RCA single-ended, ensure compatibility with various audio sources.
 
Built with precision and attention to detail, the HA-3A features in-house designed premium toroidal power transformers, point-to-point wiring by skilled craftsmen, and a high-performance ALPS volume control. The chassis and transformer pots undergo a meticulous 14-step crafting process, resulting in a refined, high-gloss finish that protects the amplifier during years of use.
 
The HA-3A is designed to deliver clean power with minimal interference, thanks to the RCA 25AX4GT rectifier tube. The single-ended vacuum tube circuit ensures a linear and transparent audio signal, with transformer-coupled balanced output for both single-ended and balanced headphones. This amplifier also offers flexible input options and optimised headphone outputs, making it an excellent choice for discerning listeners who demand the best in audio performance.