Alpine MRV-F300 4ch amplifier

V-Power amps feature speaker-level inputs that connect directly to almost any factory radio, without the need for external converters, so you can keep your factory system and upgrade to Alpine sound.
With a non-shut-down design, even if you pound your music for a long time, these amps won't shut down. They use a heat thermal management processor to make sure the heat level never gets too high - which means no distortion and no interruptions.