Cayin HA-2A

Cayin HA-2A | Desktop Tube Headphone Amplifier

Vintage Tube Character • Single-Ended Class A • Precision Craftsmanship

The Cayin HA-2A is a desktop tube headphone amplifier meticulously engineered to deliver authentic vintage tube sound with modern refinement. Combining classic NOS tubes, single-ended Class A design, and hand-wired point-to-point circuitry, the HA-2A produces rich detail, expansive soundstage, and the warm, mellow timbre that audiophiles crave.

Vintage NOS Tube Architecture

The HA-2A utilizes carefully selected five vintage NOS tubes for a luxurious and musical listening experience:

• SE Class A Power Amplification: Matched pair of Amperex 17BF11 NOS dual pentode composite tubes

• Voltage Amplification: Matched pair of Amperex ECF82/6U8 NOS high-gain pentode / medium-gain triode composite tubes

• Pre-Amp Rectification: Single RCA 17AX4GT NOS tube for plate power supply

This precise tube selection preserves the unique tonal character, delivering the mellow warmth, dynamic expression, and musicality of classic tube amplification.

Single-Ended Class A Design

Every element of the HA-2A — from component selection to final wiring — is tuned for single-ended Class A operation.
This design maximizes the natural attributes of the tubes, offering:

• Smooth, rich tonal response

• Wide, immersive soundstage

• Low distortion with effortless dynamics

Optimized Headphone Outputs

The HA-2A provides multiple headphone output options for versatile listening:

• 4-Pin XLR: Maximum power delivery for high-end headphones

• 4.4mm Balanced: Compatible with sensitive IEMs and balanced headphones

• 6.3mm Single-Ended: Standard desktop headphone connectivity

Impedance Matching: Low, Medium, or High to perfectly match your headphones for optimal performance.

Reference-Grade Craftsmanship

• Point-to-Point Wiring: Hand-wired circuits ensure the shortest signal path and maximum efficiency

• 60-Second Startup Delay Circuit: Protects tubes and reduces warm-up noise

• In-House Transformers: Designed and wound by Cayin engineers for optimal shielding and power output

Every HA-2A unit is assembled with care, preserving the integrity of its tubes and the purity of its sound.

Exquisite Desktop Design

The HA-2A is not only sonically impressive but also visually refined:

• Dual retro VU meters

• Protective tube cage

• Premium aluminum chassis with uniform finish and elegant contours

• Seamlessly integrates with the Cayin i-series portfolio

Why Choose the Cayin HA-2A

• Authentic vintage tube sound with NOS tubes

• Single-ended Class A design for warm, musical output

• Versatile, impedance-matched headphone outputs

• Hand-wired point-to-point circuitry and in-house transformers

• Elegant desktop design with retro VU meters and protective tube cage