Item is 100% Cleaned, tested, and working! High power density. All two channel models and four channel model in a 2RU chassis, eight channel model in a 3RU chassisCrown Switching Power Supply for lighter weightSelectable "Constant-Voltage" or low-impedance (4/8 ohm) operation per channel on 2-channel models, and per channel-pair on 4-and 8-channel models100V direct outputs on CTs 2000, CTs 3000, CTs 4200, and CTs 8200Legendary Crown class-I (BCA) and AB+B output topologies offer the best in amplifier reliability4- and 8-channel models offer perfect independent power solutions for multi-zoned systems· "FIT" (Fault Isolation Topology) circuitry on 4- and 8-channel models isolates fault conditions without affecting neighboring channelsComprehensive array of indicators provide accurate diagnosticsTwo-channel models are fully PIP2-compatible. Multi-channel models accept MC accessory modules.Rescue Audio - Reviving audio components and preventing landfill waste. A portion of proceeds are donated to select veterans foundations with every purchase. Check our feedback and buy with confidence!