Royer R-DB20 dBooster In-line Signal Booster

Get the most out of your passive dynamic or ribbon microphone with the phantom-powered R-DB20 signal booster and impedance buffer. Place the dBooster between any passive microphone and the input to your preamp, DAW, or audio interface and get up to 20dB of clean class-A signal boost.

The dBooster shines when miking low volume sound sources like acoustic guitars, but it can also be used when capturing electric guitar or powerful singers. Simply set the boost switch down to 12dB and dial in the right amount of gain to make your preamps sing.

Class-A circuitry means one component is responsible for amplifying the full waveform which produces low distortion and exceptional high-frequency response. This crystal clear gain allows the R-DB20 to drive signals over long cable lengths and through difficult loads like splitters or vintage preamps. The Class-A circuitry also provides a high source impedance to the microphone, so the signal arrives with low noise and exceptional headroom. All you hear is the source.

On stage or in the studio, the R-DB20 delivers the source and nothing more.

Features

• Switchable 12dB/20dB gain
• Ultra-low noise, ultra-low distortion
• Class A input stage
• Safe for use on all ribbon mics
• Wide frequency bandwidth
• Retains sound quality on long cable runs
• Maintains headroom and gain regardless of load
• 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

Specifications

• Gain: 12dB or 20dB switchable
• 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 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
• I/O connections: Balanced XLR: (Pin 1 Ground, Pin 2 Signal Hot, Pin 3 Signal Cold)
• Power: 48-Volt phantom
• Dimensions: 3.62” (92mm) L X 2.0” (51mm) W X 1.62” (41.3mm) W
• Weight: 6 oz (170g)