Sonifex RB-LU4 | Quad Stereo Balanced to Unbalanced 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 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.

Product Features

• Pre-set left and right gain controls
• 4x stereo balanced Neutrik XLR 20kΩ inputs.
• 4x stereo phono <50Ω outputs.

Typical Applications

Interfacing a professional satellite receiver to an unbalanced hi-fi system.

Product Category

Signal Converters

Technical Specifications

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

Connections

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

Support and Downloads

Handbooks & Guides

• RB-LU4 Handbook

Brochures

• Click to visit the brochures page.

Declarations

• Click to visit the declarations page.

Related Products

• RB-BL2 Unbalanced to Balanced Bi-Directional Converter
• RB-BL4 Dual Stereo Bi-Directional Matching Converter
• RB-FR1 Front Panel Kits for Redboxes
• RB-RK3 Rear Panel Mounting
• RB-UL2 Dual Stereo Unbalanced to Balanced Converter
• RB-UL4 Quad Stereo Unbalanced to Balanced Converter

Official Links

• Official Product Page