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 professional 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.
FEATURES
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12dB and 20dB gain stages
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High input impedance
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Low output impedance
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Rugged case construction
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Ultra-low noise performance
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Ultra-low distortion
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Wide frequency bandwidth
Specifications
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Gain : 12dB or 20dB switchable
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Frequency response : 20Hz-20kHz +/- .25dB
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Input Impedance : 3.6K-Ohm
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Output Impedance : (at 20dB setting) 300-Ohms
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Current draw : approximately 5mA at zero signal and 7.5mA
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at full output
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Input and output connections : Balanced XLR: (Pin 1 Ground, Pin 2 SignalHot, Pin 3 Signal Cold)
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Power : 48-Volt phantom
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Dimensions : 3.62” (92mm) L X 2.0” (51mm) W X 1.62”
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(41.3mm) W
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Weight : 6 oz (170g)
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Self-Noise : referred to -48dB re. 1V/Pa ,20dB setting < 11dBa,12dB setting < 15dBa
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Headroom : referred to -48dB re. 1V/Pa and 4mV/Pa,
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20dB setting: 127dB,
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12dB setting: 120dB
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Self-Noise : referred to -48dB re. 1V/Pa ,20dB setting < 11dBa,12dB setting < 15dBa
THD+N :
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@ 20dB Gain = .0015%, -25dBu input signal,1.3Vp-p output signal
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@ 12dB Gain = .001%, -6dBu input signal,3.66Vp-p output signal
IM Distortion :
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@ 20dB setting, < .002% @ 800mV output,
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@ 12dB setting, < .005% @ 2.6volts output