Sonifex RB-SM2 Dual Stereo to Mono Converter

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£389.94 £324.95
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Product Information

Sonifex RB-SM2 Dual Stereo to Mono Converter

The Sonifex RB-SM2 consists of two independent converters which will produce two fully buffered and balanced mono line outputs from two stereo inputs.

All connections are on the rear panel of the unit. The XLR-3 inputs are electronically balanced with an impedance of 20kohm 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 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.

  • Compact unit
  • Rack Mountable
  • 4 x XLR Inputs
  • 2 x XLR Outputs


Maximum Input Level+28dBu
Maximum Output Level+28dBu
Frequency Response20Hz to 20kHz +/- 0.1dB (600 ohm load, ref 1kHz)
Gain Range Adjustable8dB loss to 18dB gain, ref. 0dBu in on L and R
Common Mode Rejection>66dB typically
DistortionTHD @ 1kHz +8dBu 0.01%
Noise-100dB unity gain ref +8dBu
Input Impedance>20kohm balanced bridging
Inputs4 x XLR 3 pin female (balanced, can be unbalanced)
Outputs2 x XLR 3 pin male (balanced, can be unbalanced)
Mains Input Filtered IECswitchable 110-120V, or 220-240V, fused, 6W max
Net Weight1.05kg
Gross Weight1.5kg
Dimensions (Raw)28cm (W) x 10.8cm (D) x 4.2cm (H)
Dimensions (Boxed)36cm (W) x 20.5cm (D) x 6cm (H)