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For Sale: Firestone Bobby Pure-Class-A, Fully Balanced Headphone Amplifier 12-23 Price Lowered

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$590 (USD) or Best Offer
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For Sale:
Firestone Bobby Pure-Class-A, Fully Balanced Headphone Amplifier 12-23 Price Lowered

Will Ship To: Lower 48 states

Hey Guys,

 

With much regret i am selling my almost new Firestone Bobby headphone amp, i recently bought t1's and am going with tubes, unfortunately in the last week i also purchased a beyer a1 amp so i have too many and have no use for a fully balanced amp.  This is one amazing piece of equipment and the specs are below.  Shipping via UPS ground will be free within the lower 48 states.  Payment is accepted via paypal only.  My friend won this at RMAF and i bought it from him for the same price i am asking but am up for offers on this baby.  12-23 PRICE LOWERED TO $590!! Please email me with any questions.  It comes with wooden box, exterior box and power cord.  Here is a link to my review on head-fi:

 

http://www.head-fi.org/t/634517/new-firestone-audio-bobby-headphone-amp

 

 

 

 

 

The new Firestone Audio Bobby is a pure class-A, fully balanced headphone amplifier with both of single-ended inputs and balanced inputs. Adopting high-quality volume control chip, the 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.

The audio signal is enhanced by four fully identical amplifying circuits; and Tone Tuning by high-quality active/passive components

Firestone Audio always deliveries the highest quality sound for you simply and naturally.


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


Audio Performance - RCA input
(1kHz sine wave, 2Vrms output)
Frequency response (From 40Hz to 15kHz),dB :+0.02 - -0.13
Dynamic range ,dB (A) : 103.8
THD% : 0.0003
Stereo crosstalk dB:-104.3

Audio Performance - RCA standard input
(1kHz sine wave, 2Vrms output)
Frequency response (From 40Hz to 15kHz),dB :+0.02 - -0.13
Dynamic range ,dB (A) : 106.5
THD% : 0.0003
Stereo crosstalk dB:-104.6

Audio Performance - XLR input
(1kHz sine wave, 2Vrms output)
Frequency response (From 40Hz to 15kHz),dB :+0.02 - -0.13
Dynamic range ,dB (A) : 103.5
THD% : 0.0004
Stereo crosstalk dB:-104.5

Audio Performance - XLR standard input
(1kHz sine wave, 2Vrms output)
Frequency response (From 40Hz to 15kHz),dB :+0.02 - -0.13
Dynamic range ,dB (A) : 106.0
THD% : 0.0003
Stereo crosstalk dB:-106.1

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Wanted: $550 (USD)
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Head-Fi.org › Forums › For Sale / Trade Forums › For Sale / Trade (and Feedback) Forums › Amplification For Sale / Trade › Firestone Bobby Pure-Class-A, Fully Balanced Headphone Amplifier 12-23 Price Lowered