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Sonifex RB-PMX4 10 Input, 4 Output Analogue Preset Mixer
The RB-PMX4
The RB-PMX4
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The RB-PMX4 is a high performance 10 mono input to 4 mono output preset 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 accidently 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.

Uses for this product are numerous including a four bus mini-mixer, 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 will not 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 respectfully.

  Audio Specification
Input Impedance>20kohm balanced bridging
Maximum Input Level+36dBu
Frequency Response20Hz to 20kHz +/= 0.1dBu (600ohm load, @ 1kHz)
Common Mode Rejection>60dBu typically
Noise-86dBu RMS 22Hz-22kHz unity gain ref +8dB
Output Impedance<50ohm
Maximum Output LEvel+28dBu
Gain RangeAdjustable -8dBu to +18dBu gain
Off-isolation/Crosstalk>90dBu @ 1kHz
Distortion<0.01% @ 1kHz, 0dBu to +26dBu
  Connections
Inputs10 x XLR 3 pin female (balanced, can be unbalanced)
Outputs4 x XLR 3 pin male (balanced, can be unbalanced)
Mains InputFiltered IEC, switchable 110-120V, or 220-240V, fused, 6W max
  Physical Specification
WeightNett: 1.5kg
Gross: 2.2kg
DimensionsRaw: 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
Boxed: 53cm (W) x 20.5cm (D) x 6cm (H)

  Equipment Type
  Code  DescriptionPlug
RB-PMX4 UK10 Input, 4 Output Analogue Preset Mixer, 230V (UK 3 pin to IEC)UK
RB-PMX4 EU10 Input, 4 Output Analogue Preset Mixer, 230V (European Schuko 2 pin to IEC)EU
RB-PMX4 US10 Input, 4 Output Analogue Preset Mixer, 115V (USA 3 pin to IEC)US
RB-PMX4 AU10 Input, 4 Output Analogue Preset Mixer, 230V (Australasian 3 pin to IEC)AU

  Accessories for this Product
  Code  Description 
RB-RK31U rear panel rackmount kit for large RedboxRK3


Sonifex Ltd. 61 Station Road, Irthlingborough, Northants, NN9 5QE, UK.
Tel: +44 (0)1933 650700 Fax: +44 (0)1933 650726 EMail: sales@sonifex.co.uk