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Sonifex RB-UL4 Unbalanced to Balanced Quad Converter

Sonifex RB-UL4
Sonifex RB-UL4
List Price: $520.00
Our Price: $520.00

Availability: Usually Ships in 24 Hours
Product Code: 3468


Sonifex RB-UL4 Unbalanced to Balanced Quad Converter

Sonifex RB-UL4 Unbalanced to Balanced Quad Converter



The RB-LU4 is a 1U rack-mount quad stereo unit for interfacing professional balanced line levels to domestic or semi-pro unbalanced equipment, e.g. for connecting a pro satellite receiver to a consumer hi-fi system.


All connections are on the rear panel. The eight balanced XLR-3 inputs have an impedance of 10 kohms and are routed to eight unbalanced RCA 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. An LED power indicator on the front panel displays the power supply connection.




  • Maximum Input Level: +28dBu
  • Input Impedance (XLR): 10 kohms
  • Maximum Output Level: +22dBu
  • Output Impedance (RCA): <50 ohms
  • 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 (600ohm load, ref 1kHz)
  • Gain Range: Unbalanced Output : -28dBu to +15dBu, ref -15dBu into balanced XLR input
  • Connections
  • Audio Inputs
    8 x XLR 3 pin female (balanced)
  • Audio Outputs
    8 x RCA phono (unbalanced)
  • Mains Input: Filtered IEC, 110V-120V, or 220-240V, fused, 6W max
  • 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)