3-Channel mixers have a loyal following amongst DJ’s and this ultra-affordable offering in Prosonar’s consumer-grade Spintec series is no exception. The CSM311 Stereo Mixer however brings Prosonar’s experience in making some of the best professional DJ mixers into play -  which adds 3-band “kill” EQs and gain controls to the inputs, plus includes proper faders and a microphone EQ in the feature set. Assisting with a perfect mix, the input levels can be displayed on the VU meter and a premix can be done on the headphones. As an extra feature, a top-panel 3.5mm TRS jack accepts input from MP3 players and alike. As an option, the CSM311 can be equipped with an on-board MP3 player to replay files from an USB memory stick instead of the 3.5mm TRS socket. A best buy in this class!


  • 2x switchable Phono/Line stereo inputs
  • 1x switchable Line/AUX input with top-panel 3.5mm TRS stereo socket (version without MP3 player)
  • Gain Controls and 3-Band “Kill EQ” for all input channels
  • 1x microphone input on rear-side 6.3mm TRS socket
  • 2-Band EQ for microphone input
  • 45mm smooth channel faders and crossfader
  • 1 Stereo master output
  • Manual talkover for microphone input which reduces master music level by 20dB for the time the “talk” switch is pressed
  • 2×5-LED VU meter, assignable between master and split CUE
  • CUE section with volume control and PFL/Main mix control
  • Headphones output with 6.3mm rear-side stereo jack
  • Unbalanced record output
  • External 12V AC power adaptor
  • All-metal case
  • CE/ROHS compliant

Optional MP3 Player

Instead of the top-panel 3.5mm TRS stereo input jack, a 3-button operated MP3 player can be fitted (no retrofit possible – must be factory-fitted), allowing to play MP3 files from an USB stick (max. 32GB).




  • Signal/Noise >75dB (Line)
  • Crosstalk Damping >60dB (Line)
  • THD <0.07% (Line)
  • Frequency response 20Hz – 20 kHz


  • AC IN (EU version) AC220-250V~ 50Hz
  • AC IN (US version) AC110-120V~ 60Hz
  • Power consumption max. 4W
  • Dimensions W178xH255xD71mm (52mm mounting depth)
  • Weight 1.3 kg



The CSM311 can be modified to suit the customer’s needs. The following options are available (only on order – not for retrofit):

  • MP3 player for USB sticks (max. 32GB) instead of AUX input
  • Knob style and colour (various knob styles available)
  • Cabinet painting colour
  • Silkscreen artwork and colour
  • Packaging artwork



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