MS-AM504 4-Channel Marine Amplifier - 500W Features:Marine Grade Chassis - Stainless steel end caps and bottom plate provide a stunning finish with added environmental protection.Heat Sink Technology - Heat sink technology transfers heat more efficiently and offers more thermal stability for maximum component reliability.Class-AB Design - The 500 Watt 2-Ohm stable (per channel) design ensures clean and powerful amplification of the input signal,enough to rock the boat.Conformal Coated Circuitry - Provides added protection from salt air and moisture to ensure maximum product life.RCA Line Out - A pass through RCA output enables linking of multiple amplifiers for enhanced system performance.4 Channels - Capable of powering 4 speakers, a sub and a pair of speakers or 8 speakers in parallel (2 speakers per channel in parellel @ 2 Ohms).WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.