AP 4 Channel Compact Marine Amplifier - AP300/4POWER THE MOMENTWith these tough and ultracompact amplifiers, you can enjoy every note from every part of your boat. Efficient Class-D designBuilt-in LCD for manual controlIgnition protected and IP-67 Rated (excluding cables)Easy tune feature300-Watt 4 Channel AmplifierThis 4-channel amplifier can power up to a maximum of four pairs of speakers or two pairs of speakers and one subwoofer. Easy Tune FeatureFor additional optimization, pair with a Fusion stereo with built-in DSP, and download the Fusion Audio app for selectable profiles. This enables the Easy Tune feature, which streamlines amplifier setup to ensure superior sound quality and system protection. Class-D Amplifier TechnologyThe highly efficient Class-D design provides lower battery drain with a higher output than Class-AB amplifiers. This delivers increased power to the connected speakers/subwoofers for an enhanced level of audio performance. Rugged DesignThese amplifiers offer superior levels of durability and are built to IP67 standards (excluding cables) to withstand abuse in harsh marine environments. SpecificationsGeneralChannels: 4Physical Height: 1.86"Physical Width: 10.43"Physical Depth: 4.9"Operating Voltage: 9-16 VDCWater and Dust Rating: IP67AudioAmplifier Class: Class DRMS Power @ 4 OHM: Channel: 50 W x 4/150 W x 2 (Bridged)RMS Power @ 2 OHM: 4 Channel: 75 W x 4Frequency Response: 20hz - 20kHzInput Sensitivity: Switchable from 200 mV-2 V RMS (Low) to 800 mV-8 V RMS (High)Input Impedance: 11 kO (High) 20 kO (Low)Current Consumption (idle): 700-750mAFuse Rating: 35ARecommended Fuse Types: AFS, AGU, or MaxiFuseMin. Copper Power/Ground Wire: 4 awg WireProtection Circuits: Input under/over voltage, Over temperature, Output short circuitSignal ProcessingHigh-Pass/Low-Pass Full Range Filter: Yes (user selectable)Filter modes - Channel 1 2: Off, Low-pass, or High-passFilter modes - Channel 3 4: Off, Low-pass, or High-pass | JL Audio AP 4 Channel Compact Marine Amplifier - AP300/4