Brochure

AUDIO INTERFACES
Redbox - Microphone Amplifiers & Limiters
RB-MA2 Dual Microphone Amplifier
61 Station Road, Irthlingborogh, Northants, NN9 5QE, United Kingdom Tel: [phone] Fax: [phone] Email: [e-mail] Internet: www.sonifex.co.uk
Audio Specification For RB-MA2
Maximum
Input Level: -10dBu
Maximum
Output Level: +28dBu
Low Frequency
Roll-Off: 125Hz @ 6dB/octave
E.I.N.: 130dB
Common Mode
Rejection: >60dB typically
Frequency
Response: 20Hz to 20kHz ±0.1dB (600Ω load,
ref 1kHz)
Input
Impedance: 2kΩ nominal balanced
Output
Impedance: <50Ω
Gain Range: Adjustable 36dB to 75dB gain
(each input)
Distortion: 0.01% THD @ 1kHz, ref +8dBu output
Phantom Power: 48V
Connections
Inputs: 2 x XLR 3 pin female (Balanced)
Outputs: 2 x XLR 3 pin male (Balanced, can be
unbalanced)
Mains Input: Filtered IEC, switchable 110-120V, or
220-240V, fused, 6W max
Equipment Type
RB-MA2: Dual microphone amplifier
Physical Specification
Weight: Nett: 1.0kg Gross: 1.45kg
Dimensions
(Raw): 28cm (W) x 10.8cm (D) x 4.2cm (H)
(Boxed): 36cm (W) x 20.5cm (D) x 6cm (H)
The RB-MA2 consists of two independent
low-noise microphone pre-amplifiers for
converting mic level signals to line level, or
for driving long lines from microphones to
mixing equipment.
All connections and controls are on the rear
panel. The microphone inputs are XLR-3
type and are electronically balanced. The
input gain for each input can be adjusted
individually by a recessed pre-set
potentiometer which allows for the use of
both dynamic and powered microphones.
The XLR-3 line outputs are electronically
balanced and can be wired unbalanced by
grounding the non-phase signal, allowing
you to feed both balanced and unbalanced
equipment.
For each channel there are independent
switches to control a high pass filter (low
frequency roll-off at 125Hz) and to provide
phantom power at +48V to the connected
microphones.
“
All the Redboxes are screw
mountable as standard and are
either rack-mounted or have the
option to be rack-mounted.
”