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 20 kohms bridging and are routed to four unbalanced RCA (phono) outputs with an output impedance of <50 ohms.
The four RCA unbalanced inputs have an impedance of 20 kohms and are routed to four balanced XLR-3 outputs with an output impedance of <50 ohms.
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 +8dB output Common Mode Rejection >66dB typically Frequency Response 20Hz to 20kHz Â±0.1dB (600ohm load, ref 1kHz) Gain Range Unbalanced Output : -28dBu to +15dBu, ref -15dBu into balanced XLR input Balanced Output : -15dBu to +15dBu, ref -15dBu into unbalanced RCA input Connections Audio Inputs 4 x RCA phono (unbalanced), 4 x XLR 3 pin female (balanced) Audio Outputs 4 x XLR 3 pin male (balanced), 4 x RCA phono (unbalanced) Mains Input Filtered IEC, switchable 110V-120V, or 220-240V, fused, 6W max Physical Specification Weight Nett: 1.3kg Gross: 1.9kg Dimensions Raw: 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) Boxed: 53cm (W) x 20.5cm (D) x 6cm (H)
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