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

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

Royer Labs R-dB20 dBooster Class-A In-Line Microphone Signal Booster Specifications
Product Specifications	Royer Labs R-dB20 dBooster 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)