Sonifex RB-MA1Single Microphone Amplifier
The RB-MA1 consists of a low noise microphone pre-amplifier for converting mic level signals to line level, or for driving long lines from microphones to mixing equipment.
The connections and controls are on the rear panel. The microphone input is an XLR-3 type and is electronically balanced. The gain for the input can be adjusted by a recessed pre-set potentiometer which allows for the use of both dynamic and powered microphones.
The line output is of an XLR-3 type and is electronically balanced. It can be wired unbalanced by grounding the non-phase signal, allowing you to feed both balanced and unbalanced equipment. There is a switch to control a high pass filter (low frequency roll-off at 125kHz) and to provide phantom power at +48V to the connected microphone.
Please select the variant from the product options.
Audio Specification Maximum Input Level -10dBu Maximum Output Level +28dBu Frequency Response 20Hz to 20kHz +/- 0.1dB (600 ohm load, ref 1kHz) Low Frequency Roll-Off 125Hz @ 6dB/octave Gain Range Adjustable 36dB to 75dB gain Common Mode Rejection >60dB typically E.I.N. 130dB Input Impedance 2kohm nominal balanced Output Impedance <50ohm Distortion 0.01% THD @ 1kHz, ref +8dBu output Phantom Power 48V Connections Input 1 x XLR 3 pin female (Balanced) Output 1 x XLR 3 pin male (Balanced, can be unbalanced) Mains Input Filtered IEC, switchable 110-120V, or 220-240V, fused, 6W max Physical Specification Weight Nett: 0.9kg Gross: 1.35kg Dimensions Raw: 28cm (W) x 10.8cm (D) x 4.2cm (H) Boxed: 36cm (W) x 20.5cm (D) x 6cm (H)
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