PHSP5 (Pyle): This is an 8-inch indoor/outdoor PA horn speaker. It is a waterproof, 8-ohm speaker designed for high-power, long-distance sound projection (65W peak power), often used on boats for public address or as part of a marine audio system. PLMRMB4CW (Pyle): This is a 4-channel, 200-watt (or 400-watt, depending on listing specs) Marine Bluetooth Amplifier. It is fully marinized (waterproof/rust-resistant), supports Bluetooth wireless streaming, and features an electronic crossover network for powering multiple speakers, such as in a marine or AT/UTV application. EM16G50FT-OFC-TN (Enrock): This is a 16-gauge, 50-foot, tinned oxygen-free copper (OFC) speaker wire. It is marine-grade, meaning it is designed to resist corrosion from salt and moisture, and is used to connect speakers to the amplifier.