Robbie is a 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 @ 50.5) 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!
Elegance and simplicity are the driving forces behind Blue Microphones design philosophy. Robbie is no exception. 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.
Robbie’s gorgeous design and ease of use will quickly make it one of the most valuable lifeforms in your studio.
| Minimum Gain | 8 dB |
|---|---|
| Maximum Gain | 68 dB |
| Frequency Response | 10Hz - 100kHz (+ / - 2 dB ) |
| Noise @ 60 dB Gain | -131 dB EIN (10 Hz - 30 kHz, 50Ω source) |
| Noise @ 60 dB Gain | -129 dB EIN (10 Hz - 30 kHz, 150Ω source) |
| THD + Noise @ 60 dB Gain | < 0.006% (10 Hz - 20 kHz, +22 dBu output) |
| Phase Response @ 60dB Gain | < 5° (50 Hz - 20 kHz, +22 dBu output) |
| Common Mode Rejection Ratio | 60dB gain > 64dB; 30dB gain > 75 dB (50 Hz - 20 kHz, 100 mV input) |
| Maximum Input Level | +22 dBu w/o pad (8 dB Gain, 20 Hz - 20 kHz) |
| Maximum Output Level | +34 dBu (20 Hz - 40 kHz @ 10 kΩ) |
| Mic Input Impedence | 5kΩ (2x2, 5kΩ) (20Hz - 20kHz) |
| HI-Z Input Impedence | 1MΩ |
| Output Impedence | 50Ω (2x2, 5Ω) |
| Phantom Power | +48 VDC, +/- 1.5 VDC |
| Power Consumption | 8W |
| Power Requirements | 115/230 VAC, 50/60 Hz |
| Dimensions (H x W x D) | 5.25" (133.35 mm) x 8.5" (215.9 mm) x 8.25" (635 mm) |
| Shipping Weight | 10 lbs (4.54 kg) |
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
