Firestone Audio Bobby Pure-Class-A Headphone Amplifier
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Firestone Audio Bobby Pure-Class-A Headphone Amplifier

Experience Music at a Different Level with this Professional Grade Headphone Amp
  • Upgraded volume control chip reduces distortion with lower error
  • Delivers the highest quality sound through quality headphones
  • High current amplifier with a medium power transistor
  • High amplitude and fully balanced with bias control
  • Professional grade headphone amplifier

Item# 56232 PRODUCT IS UNAVAILABLE

  • Details
  • Specs
  • Reviews
  • What's Included
  • Firestone Audio has created a component that every major headphone enthusiast must-have to experience music the way it should be. Bobby is a Pure-Class-A, fully balanced headphone amplifier with both of single-ended Signals/Inputs and a balanced Signals/Inputs interface. By utilizing a high-quality volume control chip (the PGA2311), this not only reduces the distortion of the sound but with lower errors or jitters. The audio signal is greatly enhanced by four fully identical amplifying circuits and tone tuning high-quality active and passive components.


  • Specifications
    Manufacturer Firestone Audio
    Manufacturer Product No. Bobby
    UPC 4716329380568
    Power Structure Automatic transfer switching equipment with low noise, Standby and Power On mode, Tow-leveled Power supply adjustment
    Headphone Impedance 16&#8486 to 600&#8486
    Volume Control Three-leveled switch (+/-0.5dB, +/-1dB, +/-2dB), with mute control
    Circuit Protect Output short / over current protect
    Digital Volume Control TI - PGA2311
    Operational Amplifier TI - OPA604
    Power Transistor IR - IRF630 / IRF9630
    Audio Performance - RCA Input
    Frequency Response 40Hz ~ 15kHz, dB +0.02 ~ - 0.13
    Dynamic Range 103.8dB
    THD% 0.0003
    Stereo Crosstalk -104.3dB
    Audio Performance - RCA Standard Input
    Frequency Response 40Hz ~ 15kHz, dB+0.02 ~ - 0.13
    Dynamic Range 106.5dB
    THD% 0.0003
    Stereo Crosstalk -104.6dB
    Audio Performance - XLR Input
    Frequency Response 40Hz ~ 15kHz, db+0.02 ~ - 0.13
    Dynamic Range 103.5dB
    THD% 0.0004
    Stereo Crosstalk -104.5
    Audio Performance - XLR Standard Input
    Frequency Response 40Hz ~ 15kHz, dB+0.02 ~ - 0.13
    Dynamic Range 106.0dB
    THD% 0.0003
    Stereo Crosstalk -106.1
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    • 1x - Bobby Pure Class-A Headphone Amplifier
    • 1x - Power Supply
    • 1x - Owner's Manual
    • 1x - Warranty Card

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