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  • MASS-Kobo Model 433

MASS-Kobo Model 433

Hand-made Full Balanced Headphone Amplifier

  • Model 433: A delivering high-quality sound from input to output.
  • Combines the best features of models MASS-Kobo 406 and MASS-Kobo 394.
  • Versatile inputs, including XLR Balance Input and RCA Unbalance Input, with internal signal conversion.
Regular price $3,932.00
Sale price $3,932.00 Regular price $0.00
Unit price
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    MASS-Kobo Model 433

    MASS-Kobo Model 433

    Regular price $3,932.00
    Sale price $3,932.00 Regular price $0.00
    Unit price

    Model 433 is a full balanced amplifier that ensures high-quality sound from input to output.

    By combining the sound characteristics inherited from the esteemed models 406 and 394 with the output circuit of the model 402 used by the Japanese broadcasting station NHK, it delivers a pleasant and satisfying audio experience.

    It offers a range of inputs, including XLR Balance Input or RCA Unbalance Input, with the capability to internally convert unbalanced signals to balanced signals.

    The power supply supports worldwide use with AC 100V-240V and 50/60Hz compatibility.

    With ample power, model 433 is capable of driving standard dynamic headphones effectively.

    Technical Specifications

    Model
    Full Balanced Stereo headphone amp
    Frequency Characteristics
    10Hz - 100kHz (-0.5dB)
    Power Supply
    AC100 - 240V, 50/60Hz
    Electric Energy Consumption
    0.5A (with AC100V)
    Type
    Compact desktop
    Dimensions
    232mmW x 210mmD x 48mmH
    Weight
    2.4kg
    Balanced
    Unbalance
    Input
    XLR3-31
    RCA
    Output
    XLR4-31
    φ6.3 TRS
    Input Impedance
    3.7kΩ (XLR)
    12kΩ (RCA)
    Reference Input Level
    +4dBm/-10dBm (XLR)
    -10dBm (RCA)
    Maximum Input Level
    +25dBm (XLR)
    +10dBm (RCA)
    Maximum Output Level
    Balanced
    Unbalance
    P-P
    18.8V (with 32Ω loaded, 1kHz, THD+N 0.05%)
    12.2V (with 32Ω loaded, 1kHz, THD+N 0.05%)
    RMS
    6.2V (with 32Ω loaded, 1kHz, THD+N 0.05%)
    4.1V (with 32Ω loaded, 1kHz, THD+N 0.05%)
    Maximum Output without Distortion
    1.2W+1.2W (with 32 ohm load, 1kHz, THD+N 0.05%)
    500mW +500mW (with 32 ohm load, 1kHz, THD+N 0.05%)

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