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Sonifex RB-MA1

Single Microphone Amplifier
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A single Mic amplifier, suitable for driving long cables for Microphones. 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.

Product Options

RB-MA1 $324.00
RB-MA1 (115Volt version) $324.00
  • 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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