Cayin Unveils the HA-300 MK3

Cayin proudly introduces the HA-300 MK3, the latest generation of our 300B tube headphone and speaker amplifier—crafted for listeners who demand the very best in musicality, refinement, and versatility.

As the third-generation evolution of one of Cayin’s most celebrated amplifier platforms, the HA-300 MK3 takes our pure Class A, single-ended triode design philosophy to a new level. With comprehensive upgrades in circuit design, transformer performance, power supply implementation, premium component selection, and industrial finishing, the HA-300 MK3 delivers an even more accomplished and immersive listening experience.

From the first note, the HA-300 MK3 reveals the unmistakable charm of 300B amplification: rich tonal density, natural warmth, expansive soundstage, and deeply engaging musical expression. At the same time, its upgraded architecture provides improved stability, lower noise, and greater adaptability across a broader range of headphones—from highly sensitive in-ear monitors to demanding high-end full-size headphones. With built-in speaker output capability, the HA-300 MK3 also extends its appeal beyond personal audio, offering true flexibility for discerning tube enthusiasts.

Engineered to Elevate Every Detail

The HA-300 MK3 introduces a wide range of meaningful improvements that enhance both sonic performance and user experience:

· New third-generation circuit design for further refinement and musical performance

· Upgraded power supply architecture for greater stability and lower background noise

· Support for GZ34 / 5AR4 rectifier tubes, allowing broader tube-rolling compatibility

· Third-generation wide-bandwidth EI output transformers 

· Third-generation toroidal power transformer 

· Premium DUELUND coupling capacitors from Denmark 

· Low-noise regulated voltage amplification stage 

· Traditional point-to-point hand wiring 

· Balanced and single-ended headphone outputs 

· RCA and XLR inputs 

· Speaker output terminals 

· High / Medium / Low impedance matching 

· A refined new family-style industrial design with upgraded finish and detailing

Premium Tube Complement

Each HA-300 MK3 comes equipped with a carefully selected tube set:

· Genalex Gold Lion PX300B ×2 

· JJ 6SN7 ×2 

· JJ GZ34 / 5AR4 ×2 

A Classic Reimagined

The HA-300 MK3 is more than an update—it is a confident step forward in Cayin’s tube amplification journey. By combining the timeless beauty of 300B sound with meaningful engineering enhancements and a refined new presentation, the HA-300 MK3 is designed to satisfy the expectations of serious audiophiles and passionate music lovers alike.

For those seeking a premium amplifier that brings together heritage, craftsmanship, flexibility, and sonic excellence, the Cayin HA-300 MK3 is ready to take center stage.