Soundstream ST4.1000D Class D Amplifier

The latest and greatest of Class D full range technology allows us to pack 10 pounds of KICK YOUR ASS in less than 2-pound chassis, low power draw, and excellent sound quality into a small Footprint that's a great match for boats, motorcycles, ATVs, or any application where space is tight. It also have Built-in Bluetooth lets you play your favorite music directly from smartphones and other mobile devices Without the need for a receiver or the hassle of cables and plugs.  HIGHLIGHT FEATURES: High-Efficiency Class D Full-Range Amplifiers Hybrid Aluminum Alloy Heatsink for Optimum Dissipation 2-ohm Stereo & 4-ohm Bridged Full-Range Operation MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Preamp and speaker-level inputs Variable 12dB High Pass, Low Pass, & Subsonic Crossovers Class D amp technology 250 watts x 2 bridged at 4 ohms