All connections are on the rear panel. The XLR-3 inputs are electronically balanced with an impedance of 20kΩ bridging. These can be wired unbalanced to accept an output from domestic equipment.

The XLR-3 line outputs are electronically balanced with an output impedance of <50Ω. The outputs can be wired unbalanced by grounding the non-phase signal, allowing you to feed both balanced and unbalanced equipment.

Output gain adjustment using pre-set potentiometers for both converters allows a normalised mono output from domestic stereo equipment. The potentiometers are accessible through the rear panel.

Audio Specification
Maximum Input Level	+28dBu
Maximum Output Level	+28dBu
Input Impedance	>20kΩ balanced bridging
Output Impedance	<50Ω balanced
Frequency Response	20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)
Gain Range	Adjustable -8dB to +18dB gain, ref. 0dB input on L and R
Common Mode Rejection	>66dB typically
Distortion	0.01% THD @ 1kHz, ref +8dBu output
Noise	-100dB, unity gain, ref +8dBu output
Connections
Inputs	4 x XLR 3 pin female (Balanced, can be unbalanced)
Outputs	2 x XLR 3 pin male (Balanced, can be unbalanced)
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-SM2
Physical Specifications
Dimensions (Raw)	28W x 10.8D x 4.2H (1U) (CM) 11W x 4.3D x 1.7H (Inches)
Dimensions (Boxed)	36W x 20.5D x 6H (CM) 14.2W x 8D x 2.4H (Inches)
Weight	1.50kg (3.3lbs)