6-channel bridgeable amplifier piles plmr a620 is engineered as a 6-channel bridgeable marine amplifier that powers up your speaker and is universally compatible it has a bridge mode selection switch and high or low electronic crossover network waterproof and weatherproof the audio amplifier is waterproof with its marine grade rating of ip01 it's constructed with gold-plated stereo speaker output terminal connectors to combat weather corrosion with long-term ssh ort protection built with a heavy-duty aluminum alloy heatsink thermal overload speaker short protection and lead light indicator these are to protect the amp and your vehicle's electrical system from short-circuit conditions powerful 2000 watt this amplifier receiver is powerful with its 2000 watt max and dual mosfet power supply comes with dual adjustable input gain level controls between 4 to 8 ohm speaker impedance rca stere