Royer R-DB22 2-Channel In-Line Signal Booster

If you need to boost signals, make sure they're properly conditioned with Royer's dBooster2 phantom powered 2-channel in-line signal booster and DI. Fully independent channels allow you to use one as a mic booster and the other as squeaky clean DI for electric guitar or bass.

Microphones can be boosted by 12 or 20dB and the DI inputs can be set to 0 dB. Of course, you may need to boost the DI signals, so Royer included an 8 dB option in the Hi-Z mode. A dual class A input stage delivers a pristine output with virtually no noise or self-distortion so you can capture delicate instruments and voices and nothing else. The dBooster2 is even safe for use on all ribbon microphones.

The dBooster2 is an obvious choice for studio applications but it also works its magic in live applications. The ability to drive long cable lengths and difficult loads like mic splitters and vintage-style preamps with no distortion or loss of gain and excellent headroom allow it to shine when the lights go up.

The dBooster2 is built in the USA and ships from Royer's Burbank headquarters.

Royer R-DB22 Features:

• 12dB and 20dB gain stages in Mic mode
• 0dB or 8dB gain in Hi-Z DI mode
• High input impedance
• Balanced Low output impedance
• Rugged case construction
• Ultra-low noise performance
• Ultra-low distortion
• Wide frequency bandwidth
• Safe for use on all ribbon mics
• Increases headroom at the preamp
• Provides true electrical isolation
• Protects ribbon mics from phantom-power
• Minimizes mic loading
• Capable of driving difficult loads, such as mic splitters and vintage style preamps, without increased distortion or loss of gain

Royer R-DB22 Specifications:

• Gain
  • switchable 12dB or 20dB in Mic mode,
  • switchable 0dB or 8dB in DI mode
• THD+N
  • @ 20dB Gain = .0015%, -25dBu input signal, 1.3Vp-p output signal
  • @ 12dB Gain = .001%, -6dBu input signal, 3.66Vp-p output signal
• IM Distortion
  • @ 20dB setting, < .002% @ 800mV output,
  • @ 12dB setting, < .005% @ 2.6volts outpu
• 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 in Mic mode, 270K-Ohm in DI mode
• 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), HI-Z (DI) ¼-inch
  • unbalanced, tip signal HOT
  • Power: 48-Volt phantom
• Dimensions
  • 3.875” (98.425mm) L X 3.875” (98.435mm)
  • W X 1.75” (44.45mm) H
• Weight: 10.2 oz (289g)