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Sonifex RB-PMX4 - 10 Input, 4 Output Analogue Pre-set Mixer (1U)

by Sonifex
£635.94 inc. vat
£529.95 ex. vat
Please contact us for availability.

Sonifex RB-PMX4

The Sonifex RB-PMX4 is a high performance 10 mono input to 4 mono output pre-set mixer. Each of the four outputs has a 10 way DIP switch associated with it to select which of the 10 inputs are routed to it. So, by altering the DIP switches, any of the input sources can be mixed to any of the outputs. The DIP switches are enclosed by a screw-on cover on the front panel so that the settings can not be accidentally changed for secure applications.

The RB-PMX4 has been designed for situations where a small mixer is needed for installations where it will be configured and then only altered occasionally, or never altered at all. Uses for this product are numerous including a four bus mini-mixer, a multiple clean-feed generator, a 4 zone mixer for pubs and clubs and a quad stereo to mono converter to name a few.

The XLR-3 inputs and outputs are electronically balanced and can be wired unbalanced. Each output is individually buffered so that a short circuit on one won’t affect the others. Each input has its own gain control which is a pre-set potentiometer accessible through the front panel. This provides gain adjustment of -8dB to +18dB. This is useful for normalising consumer and professional signals to give outputs of -15dBu and 0dBu respectively.

Sonifex RB-PMX4 Specifications

Audio Specification

  • Input Impedance: >20kΩ balanced bridging
  • Maximum Input Level: +36dBu
  • Frequency Response: 20Hz to 20kHz ±0.1dBu (600Ω load, @ 1kHz) 
  • Common Mode Rejection: >60dBu typically
  • Noise: -86dBu RMS 22Hz-22kHz unity gain, ref +8dBu
  • Output Impedance: <50Ω
  • Maximum Output Level: +28dBu
  • Gain Range: Adjustable -8dBu to +18dBu gain
  • Off-isolation/Crosstalk: >90dBu @ 1kHz
  • Distortion: <0.01% @ 1kHz, 0dBu to +26dBu   


  • Inputs: 10 x XLR 3 pin female (Balanced, can be unbalanced)
  • Outputs: 4 x XLR 3 pin male (Balanced, can be unbalanced)
  • Mains Input: Filtered IEC, switchable 110-120V, or 220-240V, fused, 6W maximum
  • Fuse Rating:
    • Anti-surge fuse 100mA 20 x 5mm (230VAC)
    • Anti-surge fuse 250mA 20 x 5mm (115VAC)      

Physical Specification

  • Dimensions:
    • 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
    • 19” (W) x 4.3” (D) x 1.7” (H) (1U)
  • Weight:
    • Nett: 1.5kg  Gross: 2.2kg
    • Nett: 3.3lbs Gross: 4.8lbs