Description
The dBooster
In-Line 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 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.
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
- 12dB and 20dB gain stages
- High input impedance
- Low output impedance
- Rugged case construction
- Ultra-low noise performance
- Ultra-low distortion
- Wide frequency bandwidth
BENEFITS
- 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%, -6Bu 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)
