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Sonifex RB-MA2G Dual Microphone Amplifier with Gain Control
Vendor: Sonifex
Sonifex RB-MA2G Dual Microphone Amplifier with Gain Control
With two separate low-noise microphone pre-amplifiers, the RB-MA2G can drive lengthy lines from microphones to mixing equipment or convert microphone level signals to line level. It also has front panel level controls and metering. The rear panel houses all of the connectors. The microphone input is electronically balanced and of the XLR-3 type. Potentiometers with preset recessed positions allow for individual adjustment of the input gains. A 12-segment LED meter indicates the audio level for each channel, and two front panel potentiometers allow for level adjustments within ±12dB. It is possible to feed both balanced and unbalanced equipment with the electronically balanced XLR-3 line output by grounding the non-phase signal. There are separate switches for each channel that regulate a high pass filter (which rolls out low frequencies at 125 Hz) and supply phantom power (+48 V) to the attached microphone. The power supply connection is shown via an LED power indicator on the front panel.
Key Features
- Neutrik XLR connectors.
- Mic input gain adjustment.
- +48V phantom power.
- High pass (rumble) filter.
- Front panel level adjustment.
- Front panel LED metering.
Audio Specifications |
|
| Maximum Input Level: | +4dBu |
| Maximum Output Level: | +28dBu |
| Input Impedance: | 2kΩ Nominal balanced |
| Output Impedance: | <50Ω Balanced |
| Low Frequency Roll-Off: | 125Hz @ 6dB/octave |
| Gain Range: | Adjustable 12dB to 80dB gain |
| E.I.N: | -128dBu, 20kHz BW, max gain, Rs=200Ω |
| Distortion: | <0.01%, +8dBu, 20Hz – 20kHz, 40dB gain, 20kHz bandwidth |
| Common Mode Rejection: | >66dB @ 1kHz |
| Phantom Power: | 48V |
| Frequency Response: | 20Hz to 20kHz +0/-0.2dB |
Connections |
|
| Input: | 2 x XLR 3 pin female (Balanced) |
| Output: | 2 x XLR 3 pin male (Balanced, can be unbalanced) |
| Mains Input: | Filtered IEC, 110V-120V, or 220-240V switchable, fused, 9W maximum |
| Fuse Rating: | Anti-surge fuse 100mA 20 x 5mm (230VAC) Anti-surge fuse 250mA 20 x 5mm (115VAC) |
Equipment Type |
|
| RB-MA2G: | Dual microphone amplifier with gain |
Physical Specifications |
|
| Dimensions (Raw): | 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 19” (W) x 4.3” (D) x 1.7” (H) (1U) |
| Dimensions (Boxed): | 58.5cm (W) x 22.5cm (D) x 7cm (H) 23” (W) x 8.9” (D) x 2.8” (H) |
| Weight: | Nett: 1.35kg Gross: 2.0kg Nett: 3.0lbs Gross: 4.4lbs |
