Blue Mics Robbie

Blue Mics Robbie

obbie is a single-channel Class-A discrete tube microphone and instrument preamplifier.

With no ICs and only the highest-quality discrete components from input to output, Robbie is one of the quietest (-131 dB EIN @ 50.) 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 an amazing 34dB headroom before clipping!

Specifications

• Minimum Gain: 8 dB
• Maximum Gain: 68 dB
• Frequency Response (+ / - 2 dB ): 10Hz - 100kHz
• Noise @ 60 dB gain (10 Hz - 30 kHz, 50? source): -131 dB EIN
• Noise @ 60 dB gain (10 Hz - 30 kHz, 150? 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 k?): +34 dBu
• Mic Input Impedence (20Hz - 20kHz): 5k? (2x 2,5k?)
• HI-Z Input Impedence: 1M?
• Output Impedence: 50? (2x25?)
• 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