Cayin HA-3A Tube Headphone Amplifier

Cayin HA-3A

The Cayin HA-3A is a compact, desktop-friendly vacuum tube headphone amplifier known for its "exquisite design and first-class engineering," featuring a 2-stage single-ended circuit with 12AU7 drivers and 6V6GT output tubes, proprietary output transformers for balanced/single-ended outputs, multiple impedance settings (Low, Mid, High), and a clean power supply using an RCA 25AX4GT rectifier for detailed, powerful, and musically engaging sound with excellent control and spacious soundstage. It's praised for its build quality, glowing tubes, VU meters, and versatility for various headphones, offering a blend of technical performance and classic tube warmth without being overly colored, perfect for discerning audiophiles. Get this amazing AMP now from the official dealer of Cayin in Bangladesh, Gears for Ears today with an official 1 year warranty. 

Transformer-Coupled, Balanced-Driven Vacuum Tube Headphone Amplifier

Experience the perfect marriage of vintage warmth and modern precision with this meticulously engineered headphone amplifier. Designed for the discerning audiophile, it combines a classic Single-Ended vacuum tube architecture with sophisticated transformer-coupled outputs to deliver a rich, linear, and balanced listening experience.

Pure Power and Premium Tube Selection

At the heart of this amplifier is a 2-stage single-ended circuit designed to preserve the authentic "tube tone" that enthusiasts crave. By using a single-ended design, the amplifier avoids the phase cancellation common in push-pull circuits, ensuring every harmonic detail remains intact.

• Clean DC Conversion: To ensure a black background and minimal interference, the unit utilizes an RCA 25AX4GT rectifier tube. This specific version is highly regarded in the tube market for providing incredibly clean power to the amplification stages.

• Precision Driver Stage: A matched pair of JJ 12AU7/ECC82 tubes handles the initial voltage amplification, preparing the signal for the power stage.

• Linear Output Stage: A matched pair of Electro-Harmonix 6V6GT tubes serves as the output stage, operating in a highly linear condition for effortless transparency.

Advanced Transformer-Coupled Architecture

While the internal circuitry is single-ended to maintain tonal purity, the amplifier features proprietary output transformers that bridge the gap to modern balanced headphones.

• True Balanced Output: The secondary windings of the transformers are engineered to provide an alternate phase, generating a true balanced signal directly from the transformer.

• Flexible Tube Rolling: Because the design relies on matched pairs rather than quads, users can easily customize their sound signature through "tube rolling" without the complexity of sourcing four identical tubes.

Versatile Connectivity and Impedance Matching

Whether you own sensitive In-Ear Monitors (IEMs) or demanding high-impedance planar magnetic headphones, this amplifier is designed to drive them all with authority. It features three impedance settings (Low, Medium, and High) to ensure a perfect electrical match with your gear.

Available Outputs:

• 4-Pin XLR: For high-end balanced headphone cables.

• 4.4 mm Balanced: The modern standard for portable and desktop balanced gear.

• 6.35 mm (¼″) Single-Ended: For traditional high-fidelity headphones.

Exquisite Engineering in a Compact Footprint

This amplifier proves that high-end vacuum tube performance doesn't require a massive footprint. With a compact ~A4 footprint, it is designed to fit seamlessly into any desktop setup without sacrificing its premium aesthetic.

The build quality reflects a "first-class engineering" philosophy, combining rigorous production standards with a refined visual design that looks as good as it sounds.

Specifications

Amplifier

• Input Connector: XLR ×2, RCA ×2

• Tube:

  • Output: Electro Harmonix 6V6GT ×2

  • Driver: JJ 12AU7/ECC82 ×2

  • Rectifier: RCA 25AX4GT ×1

• Dimension: 306 mm × 260 mm × 170 mm

• Net Weight: 12 kg

• Fuse:

  • ~220V–240V: T1 AL250V

  • ~100V–120V: T2AL250V

• Output Tube Fuse: T1 25mAE250V

• Power Consumption: 80 W

• Working Condition: Temp: 0 °C ~ 40 °C; Humidity: 20%–80%

Headphone Output

• Rated Output (per channel):

  • 4-Pin XLR (Balanced):

    • Low: 600 mW

    • Medium: 750 mW

    • High: 850 mW

  • 4.4 mm (Balanced):

    • Low: 230 mW

    • Medium: 350 mW

    • High: 400 mW

  • 6.35 mm (Single-Ended):

    • Low: 400 mW

    • Medium: 600 mW

    • High: 700 mW

• Frequency Range: 18 Hz ~ 30 kHz ±3 dB

• THD+N: 0.2% (1 kHz, 200 mW)

• Sensitivity: 300 mV ~ 480 mV

• S/N Ratio: 100 dB (A-Weighted)

• Headphone Impedance:

  • Low (L): 8–64 Ω

  • Medium (M): 65–250 Ω

  • High (H): 251–600 Ω

• Headphone Connector: 4-pin XLR ×1, 4.4 mm ×1, 6.35 mm ×1