Sonifex RB-UL4 Quad Unbalanced to Balanced Converter

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The RB-UL4 is a 1U rack-mount quad stereo unit for interfacing domestic, or semi-pro unbalanced equipment to professional balanced line levels. The eight RCA unbalanced inputs have an impedance of 10k ohms and are routed to four balanced XLR-3 outputs with an output impedance of <50 ohms. The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel.

Audio Specification
Maximum Input Level	+28dBu
Input Impedance	10kohms
Maximum Output Level	+28dBu
Output Impedance	<50ohms
Distortion	0.01% THD @ 1kHz, ref +8dBu output
Noise	-100dB, unity gain, ref +8dB output
Common Mode Rejection	>66dB typically
Frequency Response	20Hz to 20kHz +/- 0.1dB (600 ohm load, ref 1kHz)
Gain Range	Balanced out -15dBu to +15dBu, ref -15dBu into unbalanced input
Connections
Audio Inputs	8 x RCA phono (unbalanced)
Audio Outputs	8 x XLR 3 pin male (balanced)
Mains Input	Filtered IEC, 110-120V, or 220-240V, fused
Physical Specification
Weight	Nett: 1.3kg Gross: 1.9kg
Dimensions	Raw: 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) Boxed: 53cm (W) x 20.5cm (D) x 6cm (H)

Equipment Type
Code	Description	Plug
RB-UL4 UK	Quad Balanced to Unbalanced Single Converter, 230V (UK 3 pin to IEC)
RB-UL4 EU	Quad Balanced to Unbalanced Single Converter, 230V (European Schuko 2 pin to IEC)
RB-UL4 US	Quad Balanced to Unbalanced Single Converter, 115V (USA 3 pin to IEC)
RB-UL4 AU	Quad Balanced to Unbalanced Single Converter, 230V (Australasian 3 pin to IEC)

Accessories for this Product
Code	Description
RB-RK3	1U rear panel rackmount kit for large Redbox
RB-FR1	Front panel kit without rack mounting for large Redbox