The ISM622 2-Zone Rack Mixer is the first 1U installation rack mixer in the market featuring Prosonar’s innovative HybridZone system, which allows the 2nd output to act either just as a second master or as a second zone, with each output sporting comprehensive rear-panel configuration controls. 2 microphone inputs are complemented by 6 stereo inputs, out of which two can be switched to microphone sensitivity – which makes the ISM622 a unique blend between microphone mixer and stereo line mixer. The last but not least innovation on this inconspicious but mighty mixer is the FOH input, providing a solution to venues with occasional live music events – allowing to feed the FOH system with an external balanced stereo input signal. A mixer with endless possibilities!


  • 6x Stereo input channels, each with signal-present-LED, rear-panel gain control and front-panel level control
  • 2 Stereo channels rear-side switchable between Line and Microphone
  • 1 Stereo channel rear-side switchable between Line and USB (if USB option installed)
  • 1 Stereo channel configured as balanced stereo input (FOH input)
  • Frontpanel-mounted 3.5mm stereo TRS AUX input, assignable to Input channel 1
  • 2x Mic inputs with rear-side 1/4” TRS connectors
  • Mutual voice-specific 2-Band EQ plus “on air” switches for mic inputs
  • Front-side talkover switch for Mic inputs with adjustable damping; additional sensitivity control for talkover on rear panel
  • Master section with one stereo output zone (5 LED level meter) and one mono output zone (5 LED level meters)
  • Mono zone source selectable from Input 1-5 or stereo zone signal
  • Each output zone with rear-side adjustable maximum level control
  • Each output zone both on balanced XLR and Phoenix connectors; stereo zone with additional unbalanced RCA output
  • Master EQs: 2-band (front-side for stereo zone, rear for mono zone)
  • External output mute contact to shut down master output externally
  • External emergency input with adjustable volume for emergency signal and automatic shutdown of program signal
  • PFL section with volume control and front-side 6.3mm stereo jack
  • Unbalanced record output
  • CE/ROHS compliant



The ISM622 can be fitted with a single USB solution, assignable by a rear-side switch to stereo input 5.




  • Signal/Noise >82dB (Line)
  • Crosstalk Damping >65dB (Line)
  • THD <0.05% (Line)
  • Frequency response 20Hz – 20 kHz


  • AC IN (EU version) AC220-250V~ 50Hz
  • AC IN (US version) AC110-120V~ 60Hz
  • Power consumption max. 18W
  • Dimensions W483xH44.5xD183.5mm
  • Weight 2.2 kg



The ISM622 can be modified to suit the customer’s needs. The following options are available (only on order – not for retrofit):

  • Knob style and colour (various knob styles available)
  • Cabinet painting colour
  • Silkscreen artwork and colour
  • Packaging artwork



ID, 'download'); if (!empty($downloadids[0])) echo "

" . __('Downloads') . "

"; echo download_shortcode(array('id'=>$downloadids[0])); ?>