A great addition to the boat, motorcycle, or other powersports vehicle, the DS18 MP 4" Amplified with Bluetooth Wakeboard Tower Speakers deliver loud sound without the bulky setup! A built-in, full-range, Class D amplifier in each speaker provides 40 watts RMS and can reach up to 120 watts max, giving you powerful audio performance on the water. All you need is power and ground connections. Plus, a frequency response of 60Hz to 20KHz offers a wide range of sound, while the 1" voice coil, made with PEPSV material, ensures high-quality audio. Integrated Bluetooth controls make it easy to pair with your phone, and these marine speakers are even compatible with the DS18 remote (not included) for more convenient control. Secondary aux jack with 2-channel RCA outputs increases versatility. Durable construction with a solid yet lightweight ferrite magnet accommodates tower bars ranging from 1.5"2". Great for the boat, motorcycle, or other powersports vehicle Built-in, full-range, Class D amplifier in each speaker Provides 40 watts RMS and can reach up to 120 watts max Frequency response of 60Hz to 20KHz 1" voice coil, made with PEPSV material, for high-quality audio Integrated Bluetooth controls Compatible with optional DS18 remote (not included) Secondary aux jack with 2-channel RCA outputs Durable construction with a solid yet lightweight ferrite magnet Accommodates tower bars ranging from 1.5"2"