Royer Labs dBooster

The Royer R-DB20 dBooster 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 professional applications, the dBooster provides two levels of clean gain boost; 12 dB and 20 dB, 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 12/20 dB 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.

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

Features:

• 12 dB and 20 dB 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

Specifications:

• Gain: 12 dB or 20 dB switchable
• THD+N: @ 20 dB Gain = .0015%, -25 dBu input signal,
• 1.3Vp-p output signal; @ 12 dB Gain = .001%, -6Bu input signal,
• 3.66Vp-p output signal
• IM Distortion: @ 20 dB setting, <.002% @ 800 mV output,; @ 12 dB setting, <.005% @ 2.6 volts output
• Self-noise: referred to -48 dB re 1V/pa, 20 dB setting <11 dBa, 12 dB setting <15 dBa
• Headroom: referred to -48dB re 1V/pa and 4mV/pa, 20 dB setting: 127 dB, 12 dB setting: 120 dB
• Frequency response: 20 Hz - 20 kHz ±0.25 dB
• Input Impedance: 3.6K-Ohm
• Output Impedance: (at 20 dB setting) 300 Ohms
• Current draw: approximately 5 mA at zero signal and 7.5 mA 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” (92 mm) L X 2.0” (51 mm) W X 1.62” (41.3 mm) W
• Weight: 6 oz (170 g)