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Fast & Reliable Availability
We distribute our stock across multiple warehouses to ensure quick processing and delivery.
Need something urgently for Click & Collect?
If an item shows as in stock, please call us on 01442 292929 or email sales@proav.co.uk to confirm availability before visiting.
On orders over £75
Request here
The RB-UL4 is a 1U rack-mount quad stereo unit for interfacing domestic or semi-professional unbalanced equipment to professional balanced line levels.
All connections are on the rear panel. The eight RCA unbalanced inputs have an impedance of 10kΩ and are routed to eight balanced XLR-3 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.
Maximum Inpput Level | +28dBu |
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Maximum Output Level | +28dBu |
Input Impedance | >10kΩ |
Output Impedance | <50Ω |
Distortion | 0.01% THD @ 1kHz, ref +8dBu output |
Noise | -100dB, unity gain, ref +8dBu output |
Frequency Response | 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz) |
Gain Range | Balanced output : -15dBu to +15dBu, ref -15dBu into unbalanced RCA input |
Inputs | 8 x RCA phono (Unbalanced) |
Outputs | 8 x XLR 3 pin male (Balanced) |
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) |
RB-UL4 | Quad stereo unbalanced to balanced converter |
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 |