Datasheet

2
Tel: [phone] Fax: [phone] Email: [e-mail] Internet: www.sonifex.co.uk
Audio Distribution Amplifiers
Audio & Video Interfaces
24 Way Mono Audio Distribution Amplifier
RB-DA24MD
The RB-DA24MD is a 1U rack mount high
performance 24 way audio distribution
amplifier. It has 2 inputs which can be each
individually routed to 12 outputs, or mixed
and routed to all 24 outputs. The inputs can
be configured as either dual mono, input 1
routed to outputs 1-12 and input 2 routed
to outputs 13-24, or mixed-mono, inputs 1
and 2 mixed at a pre-set level and routed
to all 24 outputs. When set to mixed-mono
operation there are 3 different output mix
level modes, enabled by altering internal
jumpers, providing -6dB, -3dB or 0dB
adjustment of the output.
The XLR inputs and D-type outputs are
electronically balanced and can be wired
unbalanced. Each output is individually
buffered so that a short circuit on one
won’t affect the others. Each output is also
protected against connection to both POE
(power over Ethernet) and phantom power
circuits.
The RB-DA24MD has master gain controls
for both input 1 and input 2 which are pre-
set potentiometers accessible through the
rear panel. These controls allow the gain to
be adjusted from -15dB to +15dB, useful
for normalising consumer to professional
signals and vice versa. An LED power
indicator on the front panel shows that the
unit is powered.
A 125Hz 6dB per octave roll off filter is
activated by a push switch on the rear
panel. When selected the filter is the applied
to both inputs.
Audio Specification
Input impedance: >20kΩ bridging (balanced)
Output <50Ω
impedance:
Maximum +28dBu
Input Level:
Maximum Output +28dBu
Level:
Frequency 20Hz to 20kHz ±0.1dB (600Ω load,
Response: ref 1kHz)
Gain Range: Adjustable -15dB loss to +15dB gain
Common Mode >66dB typically
Rejection:
LF Roll Off Filter : 125Hz at 6dB/octave
Distortion: 0.01%THD @ 1kHz,
red + 8dBu output
Noise: -100dB unity gain, ref +8dBu output
Connections
Inputs: 2 x XLR 3 pin female (balanced)
Outputs: 2 x 25 way D-type plug (balanced,
an be unbalanced)
Mains Input: Filtered IEC, switchable 110-120V,
or 220-240V, fused, 12W maximum
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm
(230VAC)
Anti-surge fuse 250mA 20 x 5mm
(115VAC)
Equipment Type
RB-DA24MD: 24 way mono distribution amplifier
Physical Specification
Dimensions (Raw): 48cm (W) x 15.8cm (D) x 4.2 (H) (1U)
19” (W) x 6.2” (D) x 1.7” (H) (1U)
Dimensions 58.5cm (W) x 27.4cm (D) x 10.8cm (H)
(Boxed): 23” (W) x 10.9” (D) x 4.3” (H)
Weight: Nett: 1.6kg Gross: 2.2kg
Nett: 3.5lbs Gross: 4.8lbs
RB-DA24MD Technical Specication