Sonifex RB-SM2 Dual Stereo To Mono Converter (used)

Sonifex RB-SM2 Dual Stereo To Mono Converter - Used

The Sonifex RB-SM2 is a dual version of the RB-SM1, consisting 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. 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.

Sonifex RB-SM2 Specifications

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: Adjust -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)   

Physical Specification

• Dimensions:
  
  • 28cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
  • 11” (W) x 4.3” (D) x 1.7” (H) (1U)
• Weight:
  
  • Nett: 1.05kg Gross: 1.50kg
  • Nett: 2.3lbs Gross: 3.3lbs