Single-channel mic preamp with balanced XLR I/O, gain control, 48V phantom power, high-pass filter, low noise, and selectable 115/230V operation for pro audio.
The Sonifex RB-MA1 is a single-channel microphone amplifier designed to elevate mic-level signals to line-level, facilitating long cable runs to mixing equipment. It features electronically balanced XLR input and output connections, with the output configurable for unbalanced operation if required. A recessed gain control allows for precise adjustment of input levels, ranging from 36dB to 75dB, accommodating various microphone sensitivities. The unit includes a switchable 125Hz high-pass filter to reduce low-frequency rumble and offers +48V phantom power for condenser microphones, both controlled via rear-panel switches. Housed in a compact, rack-mountable chassis, the RB-MA1 is suitable for both studio and live sound applications, providing a reliable solution for professional audio setups.
Caractéristiques
High-Quality Mic Preamp: Provides low-noise amplification for a single microphone input to balanced line-level output.
Phantom Power Support: Offers switchable 48V phantom power for condenser microphones.
Adjustable Gain Control: Features a wide gain range from +10dB to +60dB for precise level matching.
Flexible Connectivity: Includes an XLR input for the microphone and a balanced XLR output for professional audio systems.
Compact and Durable: Robust, rack-mountable 1U half-width design for easy integration into any setup.
LED Indicators: Provides visual feedback for power and signal presence.
Spécifications
Microphone Input: Balanced XLR-3 female connector with an input impedance of 2kiloohms.
Line Output: Balanced XLR-3 male connector with an output impedance of <50ohms.
Maximum Input Level: -10dBu.
Maximum Output Level: +28dBu.
Gain Range: Adjustable via rear-panel potentiometer.
High-Pass Filter: Switchable 125Hz filter to reduce low-frequency rumble.
Phantom Power: +48V DC, switchable.
Frequency Response: 20Hz to 20kHz, ±0.1dB.
Total Harmonic Distortion (THD): <0.01% at 1kHz, ref +8dBu output.
Noise: -88dB at unity gain, ref +8dBu output.
Power Supply: Filtered IEC, switchable 110-120V or 220-240V AC, fused, 6W max.
Dimensions: 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U).
