The Signature Series represents the highest quality purpose-built marine audio equipment from FUSION. With unrivalled bass reproduction, the MS-AB206 creates the perfect atmosphere for entertaining or relaxing. Engineered at FUSION"s industrial design headquarters in Auckland, New Zealand. Specifically tuned to produce the best acoustic result when installed in a saloon or cabin environment. When paired with the MS-BX3020 cabin speakers the sound is remarkable and like nothing you"ve heard before. 6" Dual voice coil down firing woofer which is acoustically coupled to a matching passive radiator and produces exceptional bass reproduction. The passive radiator is used to tune a small volume and driver for better low frequency performance, eliminating port turbulence and reducing motion compression.4 channel Class-D amplifier that delivers efficient and high output. Two channels are dedicated to the subwoofer with the other two channels tuned to provide power to the MS-BX3020 Cabin Speakers. A full wiring kit is included for ease of installation.This product is rated True Marine, for dry area installation only and carries with it a 3 year limited consumer warranty.