Blue Robbie Microphone Class-A Tube Preamp
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  • Regular price $999.99

Blue Robbie Microphone Class-A Tube Preamp

Robbie is a Class-A discrete tube preamp that reveals the true tone of your voice or instrument. Robbie brings our heritage of design innovation and premium sound to your entire recording process. Featuring audiophile-grade components and an IC-free signal path, Robbie the Mic Pre delivers superior accuracy and transparency every time. With an unprecedented 34dB of headroom before clipping, Robbie will add depth and dimensionality to your recordings.

Robbie puts an end to the tube vs. solid-state debate by combining the best aspects of each into one premium preamp. The fully discrete ECC88 twin triode tube input and gain stage deliver warm, rich and detailed tone—while the electronically balanced solid-state output ensures pristine sound with unmatched clarity. Together, it’s two halves of the same whole of audio quality—aka, perfection.

Every feature was designed to deliver the absolute highest sound quality. From the audiophile-grade ultra low noise metal film resistors and polystyrene capacitors, to the highest-quality discrete components for input and output, Robbie ensures unmatched performance. And with no IC’s in the signal path, you’ll never compromise the tone you worked so long to perfect.

Robbie is all about incredible audio quality without limits. With a massive 34dB of headroom before clipping, plus hand-tuned components that maintain the integrity of your sound, Robbie helps you record your music the way you’ve always imagined—powerful, precise and pure. 


In studio for enhancing the signal paths and tones of any microphone or instrument for premium audio.


  • Fully discrete Class-A signal path - completely balanced from input to output
  • Solid-state transformerless input stage coupled with twin triode (ECC88) vacuum tube gain stage
  • Ultra-low noise (-131 dB), maximum detail and exceptionally musical harmonic saturation
  • Amazing 34 dB head room before clipping
  • Front panel instrument DI for enhancing bass, electric guitar, synth or drum machine


  • Minimum Gain: 8dB

  • Maximum Gain: 68dB

  • Frequency Response (+/- 2dB): 10Hz – 100kHz

  • Noise @ 60dB gain (10Hz – 30kHz, 50Ω source): -131dB EIN

  • Noise @ 60dB gain (10Hz – 30kHz, 150Ω source): -129dB EIN

  • THD + Noise @ 60dB gain(10Hz – 20kHz, +22dBu output): <5°

  • Common Mode Rejection Ratio (50Hz – 20kHz, 100mV input): 60dB gain > 64db; 30dB gain > 75dB

  • Maximum Input Level (8dB Gain, 20Hz – 20kHz): +22dBu w/o pad

  • Maximum Output Level (20Hz – 40kHz @ 10kΩ): +34dBu

  • Mic Input Impedance (20Hz – 20kHz): 5kΩ (2x 2, 5kΩ)

  • HI-Z Input Impedance: 1MΩ

  • Output Impedance: 50Ω (2x25Ω)

  • Phantom Power: +48 VDC, +/- 1.5 VDC

  • Power Consumption: 8W

  • Power Requirements: 115/230 VAC, 50/60Hz

  • Dimensions: 8.5”L x 8.25”W x 5.25”H