Audio Interfaces - Redbox - Audio Distribution Amplifiers
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RB-DA24MD 24 Way Mono Audio Distribution Amplifier.
What The Press Said:
Radioworld.com, December 2013 >
RB-DA24MD 24 Way Mono Audio Distribution Amplifier
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.
Technical Specification For RB-DA24MD |
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Audio Specification |
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| Input impedance: | >20kΩ bridging (balanced) |
| Output impedance: | <50Ω |
| 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 |
Connections |
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| 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) |
Equipment Type |
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| RB-DA24MD: | 24 way mono distribution amplifier |
Physical Specification |
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| 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 |
