Sonifex RB-SM1 Single Stereo to Mono Converter

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The RB-SM1 consists of a converter which will produce a fully buffered and balanced mono line output from a single stereo input. All connections are on the rear panel. The XLR-3 input is electronically balanced with an impedance of 20kohm bridging. It can be wired unbalanced to accept an output from domestic equipment. The XLR-3 line output is electronically balanced with an output impedance of <50 ohm. The output can be wired unbalanced by grounding the non-phase signal, allowing you to feed balanced and unbalanced equipment. Output gain adjustment using pre-set potentiometers 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
Frequency Response	20Hz to 20kHz +/- 0.1dB (600 ohm load, ref 1kHz)
Gain Range	Adjustable -8dB to +18dB gain, ref. 0dBu in on L and R
Common Mode Rejection	>66dB typically
Distortion	THD @ 1kHz +8dBu 0.01%
Noise	-100dB unity gain ref +8dBu
Input Impedance	>20kohm balanced bridging
Output Impedance	<50ohm
Connections
Inputs	2 x XLR 3 pin female (balanced, can be unbalanced)
Outputs	1 x XLR 3 pin male (balanced, can be unbalanced)
Mains input	Filtered IEC, switchable 110-120V, or 220-240V, fused, 6W max
Physical Specification
Weight	Nett: 1.0kg Gross: 1.45kg
Dimensions	Raw: 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U) Boxed: 36cm (W) x 20.5cm (D) x 6cm (H)

Equipment Type
Code	Description	Plug
RB-SM1 UK	Single Stereo to Mono Converter, 230V (UK 3 pin to IEC)
RB-SM1 EU	Single Stereo to Mono Converter, 230V (European Schuko 2 pin to IEC)
RB-SM1 US	Single Stereo to Mono Converter, 115V (USA 3 pin to IEC)
RB-SM1 AU	Single Stereo to Mono Converter, 230V (Australasian 3 pin to IEC)

Accessories for this Product
Code	Description
RB-RK1	1U front panel rackmount kit for small Redbox
RB-RK2	1U rear panel rackmount kit for small Redbox