4-channel CX amplifiers are available in a choice of three models - a direct 70 volt model and two low impedance versions, each equipped with exclusive PowerLight switching power supply. PowerLight is a switching power supply technology that provides ample current to the audio power circuitry by charging the supply rails 230,000 times a second through an ultra-low impedance circuit. So unlike amplifiers that use conventional supplies, the audio signal is never starved prematurely and remains crisp and clean.

  * Compact size-all models only 2 RU and 14 inches deep for reduced rack cost and floor space
  * Channels 1 & 2 and 3 & 4 bridgeable for maximum flexibility
  * Active Inrush Limiting eliminates AC inrush current, removing the need for expensive power sequencers
  * HD15 DataPort connector for Q-Sys and QSControl computer control and monitoring
  * Custom integrated security cover for tamper-proof installations
  * Variable speed fan for low noise
  * 1 dB detented gain controls for fast and accurate gain settings
  * Detachable Euro style input connectors
  * DIP switch control for clip limiters, high pass filters, bridge mono and parallel operation
  * Exclusive PowerLight switch-mode power supply technology for high performance and compact size
  * Selectable high-pass filters protect speakers and prevent speaker transformer saturation with minimal effect on program material (33 Hz or 75 Hz on non-V models, 50 Hz or 75 Hz on V models)
  * Comprehensive front panel indicators including signal, clip, protect and QSC’s exclusive bridge mono and parallel input LEDs
  * Barrier strip output connector
  * Comprehensive protection circuitry including DC, infrasonic, thermal overload and short circuit protection
  * High-performance Class AB+B complementary bipolar output circuitry
  * Light weight-all models only 21 pounds (9.5 kg) for easier racking and shipping
  * 3-year warranty plus optional 3-year extended service contract
http://www.qscaudio.com