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These pro-interfaces deal with the common issue of converting balanced to unbalanced or unbalanced to balanced signals when using equipment such as mixers and recording devices. Output versions are designed for use with domestic equipment such as CD players, cassette recorders or FM tuners, these are stereo units for interfacing the outputs of unbalanced equipment to professional balanced lines. The Bi-directional offerings are used commonly with record-replay machines such as cassette recorders these are stereo units for interfacing unbalanced equipment to professional balanced lines. Bi-directional types have conversion to feed unbalanced inputs of a device as well as circuitry to interface the unbalanced outputs to balanced systems.

The RB-UL1 is a single stereo unit for interfacing domestic or semi-professional unbalanced equipment, such as a CD player, to professional balanced line levels.

The two RCA unbalanced inputs have an impedance of 10kΩ and are routed to two 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.

RB-UL1 Diagram

Additional information

Weight 1.45 kg
Dimensions 36 × 21 × 6 cm
Product can be split into multiple boxes

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specification

Technical Specification For RB-UL1

Audio Specification

Maximum Input Level:
+28dBu

Input Impedance:
>10kΩ

Maximum Output Level:
+28dBu

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

Connections

Inputs:
2 x RCA phono (Unbalanced)

Outputs:
2 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)

Equipment Type

RB-UL1:
Single stereo unbalanced to balanced converter

Physical Specification

Dimensions (Raw):
28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)

11” (W) x 4.3” (D) x 1.7” (H) (1U)

Dimensions (Boxed):
36cm (W) x 20.5cm (D) x 6cm (H)

14.2” (W) x 8” (D) x 2.4” (H)

Weight:
Nett: 1.00kg Gross: 1.45kg

Nett: 2.2lbs Gross: 3.2lbs

Brand

Sonifex

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Audio Specification

Maximum Input Level: +28dBu
Input Impedance: >10kΩ
Maximum Output Level: +28dBu
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

Connections

Inputs: 2 x RCA phono (Unbalanced)
Outputs: 2 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)

Equipment Type

RB-UL1: Single stereo unbalanced to balanced converter

Physical Specification

Dimensions (Raw): 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
11” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 36cm (W) x 20.5cm (D) x 6cm (H)
14.2” (W) x 8” (D) x 2.4” (H)
Weight: Nett: 1.00kg Gross: 1.45kg
Nett: 2.2lbs  Gross: 3.2lbs
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STUDIO General Interfaces Sonifex RB-UL1