The Pyle 4-Channel Elite Series Marine Amplifier delivers 400 watts of waterproof power, perfect for boats, poolsides, and outdoor environments. Designed with a dual Mosfet power supply, this amplifier provides high efficiency and reliable performance. The marine-grade waterproof construction ensures durability in harsh conditions. It features adjustable input gain level controls, built-in protection circuitry, gold-plated speaker terminals, and a heavy-duty aluminum heat sink for safe operation. This amplifier is ideal for powering multiple speakers with crisp, clear sound.