Sonifex RB-MA1 Overview
Elevate your mic signals with the RB-MA1 from Sonifex, a single-channel low-noise mic preamp that converts line-level to mic-level signals, ideal for stages or long cable runs. With a rugged metal chassis and recessed controls, the RB-MA1 is designed to withstand the rigors of backline use, studio work, and touring.
The RB-MA1 sports one electronically balanced XLR 3-pin female input and one balanced XLR output. The XLR output can be rewired to be unbalanced by grounding the nonphase pin, allowing for both balanced and unbalanced output. A recessed potentiometer allows for adjusting input gain from 36 to 75 dB, and DIP switches are provided for activating +48V phantom power and the 125 Hz high-pass filter. The AC input voltage can be selected for global compatibility, between 115 and 230 VAC.
Output
The XLR 3-pin output connector is electronically balanced and can be wired unbalanced by grounding the nonphase signal, allowing you to feed balanced and unbalanced equipment. It has the following connections:
- Pin 1: screen
- Pin 2: phase
- Pin 3: nonphase
Sonifex RB-MA1 Specs
General
| Frequency Response | 20 Hz to 20 kHz (±0.1 dB, 600-Ohm Load, at 1 kHz) |
| Maximum Input Level | -10 dBu |
| Maximum Output Level | +28 dBu |
| Input Impedance | 2 Kilohms |
| Output Impedance | <50 Ohms |
| EIN | 130 dB |
| THD | 0.01% (at 1 kHz) |
Inputs / Outputs
| Audio I/O | 1x XLR 3-Pin Mic Input (Balanced) 1x XLR 3-Pin Line Output (Balanced or Unbalanced) |
Power
| Power Source | AC Input |
| AC Input Power | 110 to 240 VAC, 50 / 60 Hz |
| Power Consumption | 6 W (Maximum) |
Environmental
| Environmental Protection | No |
Physical
| Mounting | Bottom: 2x Standard Rackmount Hole |
| Color | Red |
| Material of Construction | Metal |
| Dimensions | 11 x 4.3 x 1.7" / 28 x 10.8 x 4.2 cm |
| Weight | 2 lb / 0.9 kg |
In the Box
- Sonifex RB-MA1 Single-Channel Microphone Preamplifier
- IEC Power Cable
- 2-Year Manufacturer Warranty
Registration Extension: 2-Year
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