Features Compact size — only 2 RU and 14" deep for reduced rack cost and floor space Bridgeable channels 1 + 2 and 3 + 4, for maximum flexibility Active inrush limiting eliminates AC inrush current, removing the need for expensive power sequencers HD15 DataPort connector for Q-SYS networked 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) 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 Lightweight—all models only 21 pounds (9.5 kg) for easier racking and shipping 3-year warranty plus optional 3-year extended service contract All CX Series amplifiers meet the European Union's, 2006 RoHS directive to restrict the use of hazardous materials used in electronic devices. Specifications Noise, 20Hz-20kHz: <-106 dB Input Sensitivity: 1.22Vrms Gain (for full-rated output power): 31 dB @ 8 ohms Input Clipping: 10 Vrms (+22 dB) Output Circuitry: AB+B Distortion (SMPTE-IM): Less than 0.01% DISTORTION (TYPICAL): 20 Hz-20 kHz: 10 dB below rated power: Less than 0.01% THD 1.0 kHz and below: full rated power: Less than 0.01% THD Frequency Response (typical): 20 Hz-20 kHz, ± 0.2 dB 8 Hz-50 kHz, +0/-3 dB Damping Factor: Greater than 500 (1 kHz and below) Input Impedance: 6k ohms unbalanced, 12k ohms balanced Cooling: Variable speed fan, rear to front airflow through tunnel heat sink Amplifier Protection: Full short circuit, open circuit, thermal, ultrasonic, & protection. Stable into reactive or mismatched loads. Load Protection: On/off muting, DC-fault power supply protection Dimensions: 19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 rack spaces), 14" (35.6 cm) deep (from front mounting rails) Weight: 21 lb (9.5 kg) net, 27 lbs (12.3 kg) Shipping Power Requirements: 100, 120, 230 Vac, 50-60 Hz