Sonifex RB-BL4

Dual Stereo Bi-Directional Matching Amplifier

$444.00

RB-BL4

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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 ±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)