Sonifex RB-LU4 - Quad Stereo Balanced to Unbalanced Converter (1U)

Product Code: RB-LU4
Condition: Used
  • Now £299.00
  • (£358.80 inc. VAT)
  • RRP £329.95
Item in Stock | Usually dispatched within 24 hours

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 20kΩ and are routed to eight unbalanced RCA outputs with an output impedance of <50Ω.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel. A LED power indicator on the front panel displays the power supply connection.

Technical Specification For RB-LU4

Audio Specification

Maximum Input Level:+28dBu
Input Impedance: (XLR)>20kΩ balanced bridging
Output Impedance (RCA):<50Ω
Maximum Output Level:+22dBu
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)
Gain Range:Unbalanced Output : -28dBu to 0dBu, ref 0dBu into balanced XLR input


Inputs:8 x XLR 3 pin female (Balanced)
Outputs:8 x RCA phono (Unbalanced)
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-LU4:Quad stereo balanced to unbalanced converter

Physical Specification

Dimensions (Raw):48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
19” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions (Boxed):58.5cm (W) x 22.5cm (D) x 7cm (H)
23” (W) x 8.9” (D) x 2.8” (H)
Weight:Nett: 1.3kg  Gross: 1.9kg
Nett: 2.9lbs Gross: 4.2lbs
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