Royer dBooster2

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.

RECOMMENDED APPLICATIONS

• 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

• Ultra-low distortion

• Wide frequency bandwidth

GAIN:

switchable 12dB or 20dB in Mic mode

switchable 0dB or 8dB in DI mode

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 in Mic mode, 270K-Ohm in DI mode

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), HI-Z (DI) ¼-inch unbalanced, tip signal HOT.

POWER:

48-Volt phantom

DIMENSIONS:

3.875" (98.425mm) L X 3.875" (98.435mm) W X 1.75" (44.45mm) H

WEIGHT:

10.2 oz (289g)