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