Audio Interfaces - Redbox - Audio Distribution Amplifiers
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The RB-DA4x5 4 Input, 4 x 5 Output Distribution Amplifier/Mixer.
RB-DA4x5 4 Input, 4 x 5 Output Distribution Amplifier/Mixer
The RB-DA4x5 is a 1U rack-mount combined distribution amplifier and mixer. It has 4 mono analogue audio inputs on female XLR and 4 groups of 5 outputs on 15 way D-type connectors. Each output group has a five way front-panel DIP switch assigned to it which is used to select the input(s) to send to the output group. This enables each of the four inputs, or a 1kHz 0dBu tone, to be mixed to the output group.
- 4 input, 20 output distribution amplifier.
- Audio prescence LED’s for inputs or outputs.
- Balanced I/O that can be wired unbalanced.
- Outputs a 1kHz test tone e.g to check transmission lines.
The inputs and outputs are electronically balanced and can be wired unbalanced. Each input has adjustable gain using a
pre-set potentiometer, providing a gain range of -8dB to +18dB. Each output is individually buffered so that a short circuit on one output won’t affect the others. The output gain of each group can similarly be adjusted between -8dB and +18dB using pre-set potentiometers.
The DIP switch settings and gain controls are recessed beneath a front-mounting screw-on cover so that settings can not be accidently altered, for secure applications.
Four bright front-panel signal present LEDs show the levels of either the inputs or the output groups by pressing the AUDIO PRESENCE button. The LEDs will show green illumination from -12db through to 0db, amber from 0db through to +6db and red for inputs and outputs at +6db and over.
RB-BDA4x5 Block Diagram.
Technical Specification For RB-DA4x5 |
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Audio Specification |
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| Maximum Input Level: | +28dBu |
| Maximum Output Level: | +28dBu |
| Frequency Response: | 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz) |
| Input Gain Range: | Adjustable 8dB loss to 18dB gain (channel 1-4 adjust) |
| Output Gain Range: | Adjustable 8dB loss to 18dB gain (group 1-4 adjust) |
| Input impedance: | >20kΩ bridging |
| Output impedance: | <50Ω |
| Distortion: | 0.01% THD @ 1kHz, ref +8dBu output |
| Noise: | -100dB unity gain, ref +8dBu output |
| Common Mode Rejection: | >66dB typically |
Connections |
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| Inputs (4 x Mono): | 4 x XLR 3 pin female (balanced, can be unbalanced) |
| Outputs (20 x Mono): | 4 x 15 way D-type male plug (balanced, can be unbalanced) |
| Mains Input: | Filtered IEC, switchable 110-120V, or 220-240V, fused, 9W max |
| 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-DA4x5: | 4 Input, 4 x 5 output distribution amplifier/mixer |
Physical Specification |
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| Dimensions (Raw): | 48cm (W) x 15.8cm (D*) x 4.2cm (H) (1U) 19” (W) x 6.2” (D*) x 1.7 (H) (1U) |
| Dimensions (Boxed): | 59cm (W) x 27.5cm (D*) x 11cm (H) 23.2” (W) x 10.8” (D*) x 4.3” (H) |
| Weight: | Nett: 1.6kg Gross: 2.2kg Nett: 3.5lbs Gross: 4.8lbs |
| * Note that this product is deeper than standard Redboxes | |
