Cayin HA-300 Tube Headphone Amplifier

  • Cayin’s HA-300 came about as an 18 month expedition to create a headphone amplifier that would meet the expectations of audiophiles. 

    To deliver on that promise, the HA-300’s circuitry was designed to utilize the musical fidelity of the 300B tubes, powered by custom-built transformers to create perfectly balanced output through the headphones. The amplifier also utilizes a two-box design; a dedicated tube-controlled power supply and the amplifier.

    To add to Cayin’s traditional high standards of quality, this amplifier is built with US-Aviation grade electrical plugs and RC22DE4 rectifier tubes to provide clean DC power to the 300B tubes. All in all, the HA-300 amplifier is a powerful workhorse that will live up to the hopes of audiophiles.


    • Best possible integration of balanced and singled-end signal processing:
      • Input Transformer(for Bal input)-> Push-pull Single-end Amplification-> Output Transformer (for Bal output)
    • Two-box design with multi-stage tubes and regulated power supply
    • Carefully selected premium tubes
      • Power Amplification: Full Music gold pins ceramic base 300B x2
      • Voltage Amplification: Shuguang WE6SN7 replica of Western Electric x2
      • Tube Rectification: NOS RCA 22DE4 rectifier tubes x4
    • Designed in-house and features custom built power, input and output transformers
    • Choice of 3 headphone outputs for high, middle and low impedances makes sure all headphones will perform to its maximum
    • Point-to-point wielding to ensure shortest signal path and enhance the transparency and refinement of audio performance
    • High quality shield silver-plated internal cable to minimize interference during transmission
    • High-precision 24 steps potentiometer to provide low noise, high-precision volume control.
    • US Aviation standard sockets and connectors for outboard power supply connection
    • Beautifully designed and crafted VU meter
    • Supports balanced XLR and single-ended RCA inputs
  • Device: 300B Tube Headphone Amplifier
    Input Connectors: XLR or RCA
    Tubes: 2 x 300B, 2 x 6SN7, x 4 x 22DE4
    Frequency range: 10 Hz – 60 kHz (+/- 3 dB)
    Total harmonic distortion (THD): 1% (1 kHz)
    Unweighted signal-to-noise ratio: 100 dB
    Input impedance: 100 kOhm
    Input sensitivity: 440 mV
    Output power (RMS): 8W + 8W Class A
    Input power: 120 VAC
    Dimensions: Amplifier: 286mm x 368mm x 210mm 
    PSU: 59mm x 345mm x 210mm
    Weight: 75lb

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