JL Audio MVi Marine Amplifier - Featuring state-of-the-art amplifier circuits and built-in tuning capabilities, MVi amplifiers usher in a higher level of marine audio performance with unmatched fidelity and versatility. MVi amplifier; Power connector; Speaker output harnesses; 6-foot USB A/B cable; RCA Terminal covers (installed); Four stainless steel mounting screws; 2.5 mm Allen wrench; 3 mm Allen wrench; Exceeds International Standards for Salt Fog and UV Exposure; Onboard Tuning Power-Each MVi marine amplifier is packed with a complete package of DSP functions, including equalizer, delay, crossover signal routing, mixing and more.; No Knobs and Switches-TuN is free software from JL Audio that is used to make all setup and audio adjustments. It's available for download in a variety of applications for computers and most handheld devices.; Differential-Balanced Inputs-A versatile design accepts speaker level signals without a line-output converter; it also delivers outstanding noise rejection while preventing alternator whine and other noises.; Advanced Rollback Protection-Innovative circuit design ensures that the amplifier will never shut down as a result of thermal overload and keeps the music playing, even under the most demanding conditions.; Innovative, high-speed switching design synchronizes an amplifier's power supply and output channels, resulting in top-flight fidelity with ultralow noise and distortion.; This proprietary JL Audio protocol provides easy control and communication of all settings for MVi amplifiers and optional JLid accessories.; Manufacturer 3 Year Warranty;