24 Way Mono Audio Distribution Amplifier
The Sonifex 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 applied to both inputs.
|Input impedance:||>20kΩ bridging (balanced)|
|Maximum Input Level:||+28dBu|
|Maximum Output Level:||+28dBu|
|Frequency Response:||20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)|
|Gain Range:||Adjustable -15dB loss to +15dB gain|
|Common Mode Rejection:||>66dB typically|
|LF Roll Off Filter :||125Hz at 6dB/octave|
|Distortion:||0.01%THD @ 1kHz, red + 8dBu output|
|Noise:||-100dB unity gain, ref +8dBu output|
|Inputs:||2 x XLR 3 pin female (balanced)|
|Outputs:||2 x 25-way D-type plug (balanced, can 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)|
|RB-DA24MD:||24-way mono distribution amplifier|
|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 (Boxed):||58.5cm (W) x 27.4cm (D) x 10.8cm (H) 23” (W) x 10.9” (D) x 4.3” (H)|
|Weight:||Nett: 1.6kg Gross: 2.2kg Nett: 3.5lbs Gross: 4.8lbs|
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