Item #: ROYRDB20

Royer Labs R-dB20 Class-A In-Line Microphone Signal Booster

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Product Description

The Royer model R-DB20 is a phantom-powered ribbon and dynamic microphone signal booster and impedance buffer. It increases the level of passive low-output ribbon and dynamic microphones with a minimum of distortion or coloration. Designed for profes- sional applications, the dBooster provides two levels of clean gain boost; 12dB and 20dB, selectable by a front panel switch. The dBooster maintains headroom and gain regardless of load.

The Class A input circuitry presents a high source impedance to the microphone, which minimizes loading (damping). This reduces coloration and distortion while at the same time improving headroom.

By utilizing the 12/20dB gain switch, optimum balance between gain and headroom can be achieved for a variety of uses.

The low-impedance output of the dBooster is an increased microphone-level signal that can drive a digital interface directly or a standard microphone preamplifier. It also minimizes signal loss on long cable runs.

Royer Labs R-dB20 Class-A In-Line Microphone Signal Booster Features

  • 12dB and 20dB gain stages
  • High input impedance
  • 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
  • Recommended Applications:
    • Miking any low-volume sound source (acoustic instruments, vocals, etc.)
    • Recording direct to a DAW interface
    • Use on long cable runs to retain sound quality
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Phone:  Warranty:  10 Year

Product Specifications

Royer Labs R-dB20 Class-A In-Line Microphone Signal Booster 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
  • Input and Output 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)

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