Cayin HA-1A MK3 Class A Desktop Tube Headphone Amplifier and Preamplifier in One

The HA-1A MK3 Brings Cayin's Long-Standing Vacuum Tube Design into a Compact Desktop Format：
1. 12AU7/ECC82 + EL84/6BQ5-family Vacuum Tubes
2. Class-A Amplification Topology
3. Headphone Amp and Preamplifier in One
4. Compact Form Provides Easy Integration to Your Home Setup

Cayin HA-1A MK3 tube amp sitting with cage on silver color

Classic Cayin Character
At the heart of the HA-1A MK3 is a pure vacuum-tube amplification circuit designed to deliver the natural tonal richness, smoothness, and musical engagement that have made Cayin tube amplifiers popular among headphone enthusiasts around the world.

The amplifier employs 12AU7/ECC82 and EL84/6BQ5-family vacuum tubes, working together to create a refined and expressive presentation with the unmistakable character of tube amplification.

Class-A Tube Amplification
The HA-1A MK3 operates with a Class A amplification topology, prioritizing linearity and sonic purity. Rather than pursuing output power alone, the amplifier has been carefully tuned to achieve a balance between tonal density, detail, dynamics, and long-term listening comfort. It is equally suitable for vocals, acoustic music, jazz, classical music, and modern productions.

Cayin HA-1A-mk3 tube amp sitting on desk black color front left 3 quarter view

Custom Transformers
Transformers have always played an important role in Cayin tube amplifier designs. For the HA-1A MK3, Cayin has developed dedicated power and output transformers specifically matched to the amplifier circuit. Together with carefully arranged internal power-supply sections, the design provides a stable foundation for the signal path and helps minimize unwanted interference.

Designed for Different Loads
Different headphones present very different electrical demands, especially when moving between low-impedance planar headphones and higher-impedance dynamic designs. The HA-1A MK3 therefore provides multiple headphone impedance settings, allowing users to better match the amplifier with the characteristics of their headphones. Both 6.35 mm single-ended and 4-pin XLR balanced headphone outputs are provided on the front panel.

All in One Amp
The HA-1A MK3 is not limited to headphone listening. A dedicated PRE-OUT is provided on the rear panel, allowing the amplifier to serve as a tube preamplifier for active loudspeakers or an external power amplifier. With both headphone amplification and preamplifier functionality integrated into one compact chassis, the HA-1A MK3 can easily become the heart of a personal desktop audio system.

Cayin HA-1A MK3 tube amp closeup of tubes

Carefully Selected Components
Inside the HA-1A MK3, careful attention has been paid to components that directly influence sound quality and long-term reliability. Highlights include an ALPS volume potentiometer, dedicated power-supply sections, custom transformers, and Cayin's traditional attention to internal layout and assembly.

The amplifier continues Cayin's long established manufacturing philosophy, combining modern production consistency with extensive hand assembly and inspection.

Full Specifications：
Specifications for product Cayin HA-1A MK3 | Desktop Tube Headphone Amplifier
Device Features：
Headphone Amp ： Yes
Speaker Amp： No
Analog Audio Outputs：
6.35mm
4-Pin XLR
RCA
Analog Audio Inputs：2 Pairs RCA

SNR/THD：
Headphone Output:
110db (A-Weighted)
THD: 0.3%

Preamplifier Output:
105dB (A-Weighted)
THD: 0.1%

Device Weight：20 lbs.
Dimensions：9.4" x 9.4" x 5.5"

Amplifier
Output Power：
Unbalanced: 2,400 mW + 2,400 mW
Balanced: 2,700 mW + 2,700 mW
Tubes：
JJ 12AU7/ECC82 x2;
Electro-Harmonix EL84EH/6BQ5 x2