Shock-resistant, water-resistant, and built for limited-space applications, the Garmin JL Audio MX500 4-Channel Marine and Powersports Amplifier brings your ideal audio solution. This Garmin amplifier boasts NexD highly efficient Class-D design reduces current draw and heat while generating loads of high-fidelity sound without straining small charging systems. A versatile design lets this compact amp accept speaker level signals without a line-output converter, delivering outstanding noise rejection while preventing alternator whine and other noises. The cast-aluminum chassis ensures ruggedness, with an IPX7 highly water-resistant rating and protection from salt fog and exposure that exceeds international standards. For easy setup and system flexibility, this MX amp has a complete set of onboard filters and signal processing features is concealed behind the control cover, helping you get the precise audio you want every time. Mfrs. 3-year limited warranty. Designed for big sound in a small form factor NexD highly efficient Class-D design: less current draw and heat, more audio fidelity Accepts speaker level signals without line-output converter for outstanding noise rejection Cast-aluminum chassis IPX7 highly water-resistant Exceeds international standards for salt fog and UV exposure