The Cayin HA-300 MK3 is the third-generation flagship 300B tube amplifier, delivering a refined evolution of Cayin’s pure Class A, single-ended triode design. Engineered with upgraded circuitry, enhanced power supply architecture, and premium components—including DUELUND capacitors and wide-bandwidth transformers—the MK3 offers exceptional stability, lower noise, and greater sonic precision. Designed for versatility, it seamlessly drives everything from sensitive IEMs to high-end full-size headphones, while also supporting speaker output. With both balanced and single-ended connections, flexible impedance matching, and classic point-to-point hand wiring, the HA-300 MK3 combines timeless craftsmanship with modern performance, setting a new standard for tube amplification.











