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Sonifex RB-DA4x5

Distribution Amplifier and Mixer

The Sonifex RB-DA4x5 is a 1U rack-mount combined distribution amplifier and mixer.

Original price was: €685.Current price is: €640.

SKU: 105518


Sonifex RB-DA4x5

4 Input, 4 × 5 Output Distribution Amplifier/Mixer

Broadcasters Warehouse -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 presence 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 accidentally 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-DA4x5 Diagram

RB-BDA4x5 Block Diagram.

Technical Specification For RB-DA4x5

Audio Specification

Maximum Input Level: +28dBu
Maximum Output Level: +28dBu
Frequency Response: 20Hz to 20kHz ±0.1dB (600 Ω 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: <50 Ω
Distortion: 0.01% THD @ 1kHz, ref +8dBu output
Noise: -100dB unity gain, ref +8dBu output
Common Mode Rejection: >66dB typically


Inputs (4 x Mono): 4 x XLR 3 pin female (balanced, can be unbalanced)
Outputs (20 x Mono): 4 × 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 × 5 mm (230VAC)
Anti-surge fuse 250mA 20 × 5 mm (115VAC)

Equipment Type

RB-DA4x5: 4 Input, 4 × 5 output distribution amplifier/mixer

Physical Specification

Dimensions (Raw): 48 cm (W) x 15.8 cm (D*) x 4.2 cm (H) (1U)
19” (W) x 6.2” (D*) x 1.7 (H) (1U)
Dimensions (Boxed): 59 cm (W) x 27.5 cm (D*) x 11 cm (H)
23.2” (W) x 10.8” (D*) x 4.3” (H)
Weight: Nett: 1.6 kg Gross: 2.2 kg
Nett: 3.5lbs Gross: 4.8lbs
* Note that this product is deeper than standard Redboxes