IP Protection: IP64 Supply Voltage: 11 - 15VDC Fuse: 1 x 15A Idle Power (on/off): 1A / 0.04mA Max Power Consumption: 15A Size:223 x 100 x 44mm (8.77 x 3.95 x 1.7") RMS Output Power: 4 x 50W (at 4?) Datasheet Manual Thanks to the ultra-compact cast-aluminium chassis (IP64 rated) the HMP 4D amplifier is nature-proof being the ideal choice for marine installations. It features an incredible power/size ratio and an easy setup thanks to the integrated crossover filter. The Front End section features a complete and bypassablecrossover system providing full system designflexibility with or without external processors offering theuser endless connection possibilities with any source.Inputs feature a special balanced circuitry ensuring highrejection against electro-magnetic interferences fornoise-free results. Water Jet Tested The protection grade IP64 define all the Hertz Marine products as totally protected against water jets of different entities making them highly performant in the marine environment. Corrosion Protection Electronics components corrosion caused by exposure in wet environments is totally neutralized by the use of dedicated marine grade (epoxy coated) PCB boards. Salt Fog Tested To satisfy the standards required by ASTM-B117 Hertz Marine products are tested with massive salt fog spray to ensure a complete resistance to corrosion typical of this atmospheric agent. html-body [data-pb-style="6390725643036"]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px 0px 10px; padding: 10px;} html-body [data-pb-style="639072564303F"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;} html-body [data-pb-style="6390725643046"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;} html-body [data-pb-style="639072564304C"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}