MB Quart NA3-560.4 Nautic Series Marine Class SQ Amplifier 560W Max, 4 Channel

• 560 watts max; 140 watts x 4 channels at 2 ohms; 70 watts x 4 channels at 4 ohms;• Ideal for marine, powersports, and other rugged applications to power 2 or 4 speakers; selectable 2- or 4-channel modes;• Frequency response: 10 Hz to 45 kHz for faithful sound reproduction;• Marine-grade IPX standards for waterproofing and dustproofing;• Nautic gloss-white epoxy finish helps reject heat on the surface of the amplifier; connections from amp are sealed and grommeted; prewired to PC board for additional protection; connector cover should be left closed on RCA jacks that are not used;• Robust, marine-grade MOSFET Pulse Width Modulation power supply allows amp to product efficient power without taxing the boat's electrical system;• Utilizes MB Quart's unique Class SQ topology that is matched with Q-Stasis for sonic accuracy and clarity that exceeds standard Class A/B amplifiers;• FLUID-FETS are painstakingly selected for their ability to efficiently produce power and mimic the sound quality of the highest-end home amplifiers;• Auto-sense feature for high-level inputs; variable electronic crossovers allow for complete control of the sound; monitor overload and speaker short protection with illuminated indicators on the amp's end panel;• DC signal sense switch will allow the amp to turn on when a signal is received on the RCA inputs, so an amp remote turn-on wire is not needed to turn amp on; feature can be turned off;• SMT (Surface Mount Technology) for larger tolerances from human placement; components withstand shock and vibration making them perfect for audio designed for all vehicles;• Includes harness, installation hardware, Allen wrench, installation guide, and sticker;