For the requirements of any high quality audio production facility working in stereo, we present the m904 stereo monitor controller.

The m904 combines all the same features and technology found in our flagship m906 surround controller, but is for stereo monitoring only. It is a perfect control center for any type of audio production facility - from project studio to world class mastering facility.

The m904 offers a full complement of balanced and unbalanced stereo analog and digital inputs, the latter featuring our latest generation reference quality 24/192 DAC technology. Like the m906, all inputs and outputs can be user calibrated for seamless integration into any playback environment with all types of playback equipment.

The m904 is configured as a 2U rack chassis, with all system controls built into the unit itself. It is also available as the m904b, which comes as a blank 2U rack chassis and requires the m904RCU remote control unit (sold separately). Additionally, a standard m904 can be used with the m904RCU, with the user able to select between local and remote control.

Also included as a standard feature is our critically acclaimed m902
headphone amplifier circuitry, with two output jacks on the mainframe and one additional output on the m904RCU. This circuitry provides true audiophile headphone amplification for critical monitoring, mixing and quality control.

While the m904 provides an astounding complement of useful features, the real achievement for us was to implement all of this while maintaining our impeccable high fidelity audio performance.

The m904 and m904b are designed and built to empower audio professionals with the highest performance and most comprehensive feature set that any monitor control systems have to offer.

• multiple stereo analog inputs
  
  
• 24bit/192kHz digital stereo inputs- AES3, S/PDIF, ADAT and TOSLINK
  
  
• s-LockTM phase lock loop sample clock regeneration for ultra-low jitter and rock solid digital stability
  
  
• precision speaker and headphone level controls with a 100dB range in 0.5dB steps
  
  
• every electrical and mechanical design element maximized for absolute purist, audiophile performance
  
  
• available as the m904b, which has a blank panel mainframe unit and is controlled via m904RCU (sold separately)
  
  
• all I/O and audio are routed in the 2U rack mount mainframe powered by an internal AC supply
  
  
• multiple speaker set selection - up to 3 stereo sets
  
  
• m902 style high-current audiophile headphone
  amplifier built in with two outputs on front panel
  
  
• complete system level calibration (inputs, outputs, inter-channel balance, dim)
  
  
• balanced talkback microphone input and activation switch with additional external foot switch control jack
  
  
• fixed level stereo DAC output for direct audio transfers
  
  
• five year warranty on parts and labor

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