Sonifex RB-BL4 Dual Stereo Bi-Directional -10/+4 Unbalanced/Balanced Level Matching Converter
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Description
The The RB-BL4 is a dual bi-directional stereo unit for interfacing domestic or semi-pro unbalanced equipment to professional balanced line levels, and vice versa. The four XLR-3 electronically balanced inputs have an impedance of 20kohms bridging and are routed to four unbalanced RCA (phono) outputs with an output impedance of <50ohms. The four RCA unbalanced inputs have an impedance of 20kohms and are routed to four balanced XLR-3 outputs with an output impedance of <50ohms. All connections are on the rear panel. The output gain can be adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel.
| Audio Specification | |
| Maximum Input Level | +28dBu |
| Maximum Output Level | +28dBu |
| Input Impedance (RCA) | >10kohms unbalanced |
| Input Impedance (XLR) | >20kohms balanced bridging |
| Output Impedance (RCA) | <50ohms |
| Output Impedance (XLR) | <50ohms |
| 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 (600ohms load, ref 1kHz) |
| Gain Range | |
| Unbalanced Output | -28dBu to 0dBu, ref 0dBu into balanced XLR input |
| Balanced Output | -15dBu to +15dBu, ref -15dBu into unbalanced RCA input |
| Connections | |
| Inputs | 4 x RCA phono (Unbal), 4 x XLR 3 pin female (Bal) |
| Outputs | 4 x XLR 3 pin male (Bal), 4 x RCA phono (Unbal) |
| 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-BL4 | Dual stereo bi-directional matching converter |
| Physical | |
| Dimensions (Raw) | 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 19Ó (W) x 4.3Ó (D) x 1.7Ó (H) (1U) |
| Dimensions (Boxed) | 58.5cm (W) x 22.5cm (D) x 7cm (H) 23Ó (W) x 8.9Ó (D) x 2.8Ó (H) |
| Weight | |
| Nett | 1.3kg |
| Gross | 1.9kg |
| Nett | 2.9lbs |
| Gross | 4.2lbs |
The The RB-BL4 is a dual bi-directional stereo unit for interfacing domestic or semi-pro unbalanced equipment to professional balanced line levels, and vice versa. The four XLR-3 electronically balanced inputs have an impedance of 20kohms bridging and are routed to four unbalanced RCA (phono) outputs with an output impedance of <50ohms. The four RCA unbalanced inputs have an impedance of 20kohms and are routed to four balanced XLR-3 outputs with an output impedance of <50ohms. All connections are on the rear panel. The output gain can be adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel.
| Audio Specification | |
| Maximum Input Level | +28dBu |
| Maximum Output Level | +28dBu |
| Input Impedance (RCA) | >10kohms unbalanced |
| Input Impedance (XLR) | >20kohms balanced bridging |
| Output Impedance (RCA) | <50ohms |
| Output Impedance (XLR) | <50ohms |
| 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 (600ohms load, ref 1kHz) |
| Gain Range | |
| Unbalanced Output | -28dBu to 0dBu, ref 0dBu into balanced XLR input |
| Balanced Output | -15dBu to +15dBu, ref -15dBu into unbalanced RCA input |
| Connections | |
| Inputs | 4 x RCA phono (Unbal), 4 x XLR 3 pin female (Bal) |
| Outputs | 4 x XLR 3 pin male (Bal), 4 x RCA phono (Unbal) |
| 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-BL4 | Dual stereo bi-directional matching converter |
| Physical | |
| Dimensions (Raw) | 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 19Ó (W) x 4.3Ó (D) x 1.7Ó (H) (1U) |
| Dimensions (Boxed) | 58.5cm (W) x 22.5cm (D) x 7cm (H) 23Ó (W) x 8.9Ó (D) x 2.8Ó (H) |
| Weight | |
| Nett | 1.3kg |
| Gross | 1.9kg |
| Nett | 2.9lbs |
| Gross | 4.2lbs |
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