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.
Sonifex RB-BL4 Dual Stereo Bi-Directional Matching Amplifier datasheet