Sonifex RB-BL4 Quick Start Guide

Redbox RB-BL4
August 2008
www.sonifex.co.uk
t: +44 (0)1933 650 700 f: +44 (0)1933 650 726
sales@sonifex.co.uk
AUDIO INTERFACES
Redbox - Matching Converters
RB-BL4 Dual Stereo Bi-Directional Matching Converter
The RB-BL4 is a dual bi-directional stereo unit for interfacing domestic or semi-pro unbalanced equipment to professional balanced line levels, and vice versa.
The four XLR-3 electronically balanced inputs have an impedance of 20kΩ bridging and are routed to four unbalanced RCA (phono) outputs with an output impedance of <50Ω.
MATCHING CONVERTERS
The four RCA unbalanced inputs have an impedance of 20kΩ and are routed to four balanced XLR-3 outputs with an output impedance of <50Ω. All connections are on the rear panel.
The output gain can be adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel.
Audio Specication For RB-BL4
Maximum +28dBu Input Level:
Maximum +28dBu Output Level:
Input >10kΩ unbalanced Impedance (RCA):
Input >20kΩ balanced bridging Impedance (XLR):
Output <50Ω Impedance (RCA):
Output <50Ω Impedance (XLR):
Distortion: 0.01% THD @ 1kHz, ref +8dBu output Noise: -100dB, unity gain, ref +8dBu output Common Mode >66dB typically
Rejection: Frequency 20Hz to 20kHz ±0.1dB (600Ω load,
Response: ref 1kHz) Gain Range: Unbalanced Output : -28dBu to
0dBu, ref 0dBu into balanced XLR input Balanced Output : -15dBu to +15dBu, ref -15dBu into unbalanced RCA input
Connections
Inputs: 4 x RCA phono (Unbal), 4 x XLR 3 pin female (Bal)
Outputs: 4 x XLR 3 pin male (Bal), 4 x RCA phono (Unbal)
Mains Input: Filtered IEC, switchable 110-120V, or 220-240V, fused, 6W max
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC) Anti-surge fuse 250mA 20 x 5mm (115VAC)
Equipment Type
RB-BL4: Dual stereo bi-directional matching converter
Physical Specication
Dimensions 48cm (W ) x 10.8cm (D) x 4.2cm (H) (1U) (Raw): 19” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions 53cm (W ) x 20.5cm (D) x 6cm (H) (Boxed) : 21” (W) x 8” (D) x 2.4” (H)
Weight: Nett: 1.3kg Gross: 1.9kg Nett: 2.9lbs Gross: 4.2lbs
www.sonifex.co.uk
www.sonifex.co.uk
t:+44 (0)1933 650 700
t:+44 (0)1933 650 700 f:+44 (0)1933 650 726
f:+44 (0)1933 650 726 sales@sonifex.co.uk
sales@sonifex.co.uk
61 Station Road
61 Station Road Irthlingborough
Irthlingborough Northants NN9 5QE
Northants NN9 5QE United Kingdom
United Kingdom
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