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Bobby

Perfessional Headphone Amplifier

Bobby is a Pure-Class-A, Fully Balanced Headphone Amplifier with both of single-Ended Signals/Inputs and Balanced Signals/Inputs interface. Adopting high-quality volume control chip as PGA2311 can not only reduce the distortion of the sound but lower error. The audio signal is enhanced by four fully identical amplifying circuits; and Tone Tuning by high-quality active/passive components (Wima, Vishay BC).Appearance of Bobby with Black and Sliver Colors show the main brand image of FSA-Noble、Steady、Positive that always deliveries the high quality sound for the consumers simply and naturally.



  • Specification
  • Packing/Usage
  • Review
  • * Amplifier Structure: Compose by four Operational Amplifiers and Medium Power Transistor. High current, High amplitude and fully balanced with bias control. * Power Structure: Automatic transfer switching equipment with low noise, Stand by and Power on mode, Tow-leveled Power supply adjustment. * Headphone Impedance: 16 ohm to 600 ohm. * Volume Control: Three-leveled switch (±0.5dB, ±1dB, ±2dB), with mute control. * Circuit Protect: Output short / over current protect.

    Audio Performance (1kHz sine wave, 2Vrms output, 24-bit / 48kHz)---RCA→XLR

    * Frequency response (From 40Hz to 15kHz): +0.02~0.13dB
    * Noise level (1kHz, A-Weighted): -103.9dB
    * Dynamic range (1kHz, A-Weighted): 103.8 dB
    * THD%: 0.0003%
    * Stereo crosstalk: -104.3 dB

    Chips

    * Digital Volume Control: TI – PGA2311
    * Operational Amplifier: TI – OPA604
    * Power Transistor: IR – IRF630 / IRF9630

    Connectivity

    * Line Input:
    1 of RCA jack (Single-Ended)
    1 of XLR jack (Balanced)

    * Line Output:
    2 of 6.3mm phone jack (Single-Ended)
    1 of XLR phone jack (Balanced)

    (Only using 1 of XLR phone jack simultaneously, at most 2 of 6.3mm phone jack)

    System Requirements

    * Using any equipment with Single-Ended-out or Balanced-out function.
  • Packing

    * Bobby
    * 3P power cable
    * User manual
    * Warranty card

    Weight/Size

    * Weight: 4506g
    * Net Weight: 3658g

    * Size(H*W*D): 330mm * 425mm * 77mm
    * Net Size: 218mm * 308mm * 64mm

    Usage

  • Pure Class A fully balanced headphones amplifier review
    by Francesco Donadel Campbell
    FSA Bobby : The Monster
    by EarMass

@Copyright by FSA Co., Ltd.