Lanzar Amplifier Car Audio, Amplifier Mono Block, 1300 Watt, 1 Ohm Stable, Class D, MOSFET, RCA Input, Bass Control, Mobile Audio, Amplifier for Car Speakers, Car Electronics (OPTI1400D) AUDIO EVOLUTION: The Lanzar car speakers amp features regulated MOSFET Pulse Width Modulated (PWM) that maintain rated power over a wide range of battery voltage. SOUND SPECIALIZATION: This high-powered amplifier monoblock is cutting edge technology at its finest. Gold-plated RCA connectors and speaker screw-down terminals ensure a secure connection between amplifier and speakers that allow distortion-free sound. INTELLIGENT DESIGN: The class amplifier features include a double-sided epoxy PCB circuit board, soft turn-on/off; and thermal, overload, and speaker-short protection. RCA JACKS: The mono amp line-out jacks allow you to build multiple amplifier systems without having to use splitter cords to distribute the signal, making it easier to bring a set into the first amp, and use the line out jack as the feed to the next amp A CLASS OF ITS OWN: The amplifier mono boasts excellent frequency response rates 15Hz - 150Hz (+/-3dB), setting them apart from others amps on the market.