Handbook

Redbox User Handbook No 2
29
Function
Group 1
Routing
Group 2
Routing
Group 3
Routing
Group 4
Routing
Input 1 SW1-1 On SW1-6 On SW2-1 On SW2-6 On
Input 2 SW1-2 On SW1-7 On SW2-2 On SW2-7 On
Input 3 SW1-3 On SW1-8 On SW2-3 On SW2-8 On
Input 4 SW1-4 On SW1-9 On SW2-4 On SW2-9 On
Test Tone SW1-5 On SW1-10 On SW2-5 On SW2-10 On
Fig 8-7: RB-DA4x5 Routing Selection Switch Functions.
Alignment Test Tone
Each of the output groups has the capability of selecting a 1kHz, 0dBu test tone. This signal
can be used as a reference to set the output gain levels. Once these values are known then
the input gains can be set by providing a known tone to the input and adjusting the input
gain to the required level. It is possible to use this test tone as a reference level for the input
gain by adjusting the output gains to unity and then looping back any output to the input
connector. The on-board oscillator is temperature sensitive and in cold conditions may take
a short time to start oscillating. In any case you should always allow the unit to fully come to
its normal operating temperature before adjusting the gains.
Technical Specications
Audio Specications
Maximum Input Level: +28dBu
Input Impedance (XLR): >20kΩ balanced bridging
Output Impedance: <50Ω
Maximum Output Level: +28dBu
Distortion: 0.01% THD @ 1kHz, ref +8dBu output
Noise: -100dB, unity gain, ref +8dBu output
Common Mode Rejection: >66dB typically
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)
Connections
Inputs (4 x Mono): 4 x XLR 3 pin female (Balanced)
Outputs (20 x Mono): 4 x 15 way D-type (Balanced)
Mains Input: Filtered IEC, 110V-120V, or 220-240V switchable,
fused, 9W maximum
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)
Anti-surge fuse 250mA 20 x 5mm (115VAC)
Equipment Type
RB-DA4x5:
4 input to 20 output distribution amplier & mixer
Physical Specications
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 27.4cm (D*) x 10.8cm (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.
AUDIO DISTRIBUTION AMPLIFIERS - RB-DA4x5
AUDIO DISTRIBUTION
AMPLIFIERS
8