Blue Microphones Robbie - Flagship Tube Mic And Instrument Preamp

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  • Single-Channel Class A Discrete Tube Microphone and Instrument Preamplifier

Single-Channel Class A Discrete Tube Microphone and Instrument Preamplifier

Simplicity of design. Purity of sound. Robbie is Blue's Class-A discrete tube microphone and instrument preamplifier. All of the technical quality and design innovation that goes into our line of award-winning microphones has been engineered into making Robbie the finest tube preamp available today. With no ICs and only the highest-quality discrete components from input to output, Robbie is one of the quietest (-131 dB EIN @ 50 ohms) and most detailed (THD 0.006%) tube preamps available today. It features audiophile-grade ultra low noise metal film resistors and polystyrene capacitors, and provides the user with the best of both worlds: an electronically-balanced, fully discrete input stage, tube gain stage (ECC88 twin triode), and an electronically-balanced solid-state output stage. There is no switching crossover distortion anywhere in the completely balanced audio signal path. And if that's not enough, Robbie achieves and amazing 34dB headroom before clipping! Designed from the ground up, this limited production mic pre is like nothing else commercially available today.

  • Minimum Gain: 8 dB
  • Maximum Gain: 68 dB
  • Frequency Response (+ / - 2 dB ): 10Hz - 100kHz
  • Noise @ 60 dB gain (10 Hz - 30 kHz, 50Ω source): -131 dB EIN
  • Noise @ 60 dB gain (10 Hz - 30 kHz, 150Ω source): -129 dB EIN
  • THD + Noise @ 60 dB gain (10 Hz - 20 kHz, +22 dBu output): < 0.006%
  • Phase Response @ 60dB gain (50 Hz - 20 kHz, +22 dBu output): < 5
  • Common Mode Rejection Ratio (50 Hz - 20 kHz, 100 mV input): 60dB gain > 64dB; 30dB gain > 75 dB
  • Maximum Input Level (8 dB Gain, 20 Hz - 20 kHz): +22 dBu w/o pad
  • Maximum Output Level (20 Hz - 40 kHz @ 10 kΩ): +34 dBu
  • Mic Input Impedence (20Hz - 20kHz): 5kΩ (2x 2,5kΩ)
  • HI-Z Input Impedence: 1MΩ
  • Output Impedence: 50Ω (2x25Ω)
  • Phantom Power: +48 VDC, +/- 1.5 VDC
  • Power Consumption: 8W
  • Power Requirements: 115/230 VAC, 50/60 Hz
  • Dimensions: 81/2'L X 81/4'W X 51?4'H
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