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Blue Microphones ROBBIE

Single-Channel Class A Tube Mic Preamp


Like a Corvette, or the Concord Jet, something that looks this cool just has to be a top performer, and the Robbie is for sure. With no ICs and only the highest-quality discrete components from input to output, this is one of the quietest (-131 dB EIN @ 50 ohms) and most detailed (THD 0.006%) tube preamps on the market. It features audiophile-grade ultra low noise metal film resistors and polystyrene capacitors, and combines the best of both solid state and tube technology to give you 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 balanced audio signal path. And remarkably, Robbie achieves an amazing 34dB headroom before clipping!

Like all Blue products, the simple yet elegant design of the Robbie shines through. The front panel features only a large backlit potentiometer (gain) and 1/4" hi-Z instrument input. On the back, you'll find the power cable input, power switch, balanced XLR mic input, balanced XLR line output, polarity switch, -20 dB pad, input selector switch (mic/instrument) and phantom power on/off.

Turn some heads, and open some eyes [and ears!] with the Robbie.

Main Features:
• Minimum Gain: 8 dB
• Maximum Gain: 68 dB
• Frequency Response (+ / - 2 dB ): 10Hz - 100kHz
• Noise @ 60 dB gain (10 Hz - 30 kHz, 50O source): -131 dB EIN
• Noise @ 60 dB gain (10 Hz - 30 kHz, 150O 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 kO): +34 dBu
• Mic Input Impedence (20Hz - 20kHz): 5kO (2x 2,5kO)
• HI-Z Input Impedence: 1MO
• Output Impedence: 50O (2x25O)
• Phantom Power: +48 VDC, +/- 1.5 VDC
• Power Consumption: 8W Power Requirements: 115/230 VAC, 50/60 Hz

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