QSC CX168 Power Amplifier 130 Watts 8 channel at 4 Ohms 3-Pin Detachable-Blocks Variable-Speed-Fan 100 watts per channel at 70 volts (CX108V) 90 watts per channel at 8 ohms and 130 watts per channel at 4 ohms (CX168) Compact size - only two rack spaces and 14" deep for reduced rack space Channel pairs bridgeable for maximum flexibility Exclusive PowerLight switch-mode power supply technology for high performance and compact size