R-DB22 - Two Channel In-Line Signal Booster & DI
The Royer model R-DB22 dBooster2 features two channels of dBooster ribbon & dynamic microphone signal boosting and impedance buffering technology. Each channel also doubles as a high-impedance DI.
When used as a signal booster, both channels of the dBooster2 increase the level of passive low-output ribbon and dynamic microphones with a minimum of distortion or coloration. Designed for professional applications, each dBooster2 channel offers two levels of clean gain boost: 12dB or 20dB, selectable by a front panel switch.
The dBooster2’s Class A input presents a high source impedance to microphones, minimizing loading (damping) and improving headroom. By utilizing the 12/20dB gain switch, optimum balance between gain and headroom can be achieved for a variety of uses.
The dBooster2’s low-impedance output 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.
When used as a DI for unbalanced guitar level sources, the dBooster2 provides either 0dB or 8dB of gain, selectable from the front panel switch. The single ended high-impedance (230K-Ohm) DI input maintains headroom and gain regardless of load, with minimal distortion or coloration.
Features
- Two channel microphone In-Line signal booster
- 12dB and 20dB gain stages in Mic mode
- 0dB or 8dB gain in Hi-Z guitar input mode
- High input impedance
- Balanced Low output impedance
- Rugged case construction
- Ultra-low noise performance and ultra-low distortion
- Wide frequency bandwidth (20 Hz bis 20 kHz)
- Increases headroom at the preamp
- Provides true electrical isolation
- Safe for use on all ribbon mics and protection 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
Technical Specifications
- Gain: Mic mode: 12dB or 20dB switchable, DI mode: switchable 0dB or 8dB
- THD+N: @ 20dB Gain = 0.0015%, -25dBu input signal, 1.3Vpp output signal, @ 12dB Gain = 0.001%, -6Bu input signal, 3.66Vp-p output signal
- IM Distortion: @ 20dB setting, < 0.002% @ 800mV output, @ 12dB setting, < 0.005% @ 2.6volts output
- Self-Noise: 20dB setting < 11dBa, 12dB setting < 15dBa (referred to -48dB re. 1V/pa)
- Headroom: 20dB setting: 127dB, 12dB setting: 120dB (referred to -48dB re. 1V/pa and 4mV/pa)
- Frequency response: 20Hz-20kHz +/- 0.25dB
- Input Impedance: Mic mode: 3.6 kOhms, DI mode: 270 kOhm
- Output Impedance: 300 Ohms
- Current draw: 5mA (min.) 7.5mA (max.)
- Input connections: 2x Balanced XLR/TRS Combo
- Output connections: Balanced XLR
- Power: 48 V phantom power
- Dimensions (L x W x H): 99 x 99 x 45 mm
- Weight: 289g
