Royer Labs / dBooster

dBooster is an in-line booster for ribbon and dynamic microphones. It has two gain settings, 12dB and 20dB, allowing you to dial in the gain that's right for a variety of voices and instruments.

The 20dB setting provides a clean boost for soft instruments and vocals. If you are using a louder instrument like an electric guitar, use the 12dB setting to avoid overloading the preamp or I/O.

dBooster's Class A input stage provides a clean boost with ultra-low noise and distortion.
dBooster's low impedance output simplifies everything in the studio, and on the live stage too. It provides excellent headroom and vintage-style sound with minimal gain loss even over long cable runs.

dBooster works particularly well with Royer Labs ribbon microphones such as the R-121, R-10, and SF-12.
It works great with dynamic microphones as well as ribbon microphones.

All dBoosters are assembled in the USA and shipped from Royer Labs headquarters in Burbank, California.

■Features
・In-Line Signal Booster
・12dB/20dB gain switch
・Ultra-low noise
・Class A input stage
・Safe to use with all ribbon microphones
・Wide frequency bandwidth
・Maintains sound quality even with long cables

■Specifications
Gain: 12dB or 20dB
THD+N: @ 20dB Gain = .0015%, -25dBu input signal, 1.3Vp-p output signal @ 12dB Gain = .001%, -6Bu input signal, 3.66Vp-p output signal
IM Distortion: @ 20dB setting, < .002% @ 800mV output, @ 12dB setting, < .005% @ 2.6volts output
Self-Noise: referred to -48dB re. 1V/pa, 20dB setting < 11dBa,12dB setting < 15dBa
Headroom：referred to -48dB re. 1V/pa and 4mV/pa, 20dB setting: 127dB,12dB setting: 120dB
Frequency response: 20Hz-20kHz +/- .25dB
Input Impedance: 3.6K-Ohm
Output Impedance: (at 20dB setting) 300-Ohms
Current draw: approximately 5ma at zero signal and 7.5ma at full output
Input and output connections: Balanced XLR: (Pin 1 Ground, Pin 2 Signal Hot, Pin 3 Signal Cold)
Power: 48-Volt phantom
Size: 92mm/51mm/41.3mm
Weight: 170g

*Cannot be used with condenser microphones.