Portable, Compact Solutions for Superior Sound and Convenience The MSR250 delivers the ideal blend of power, performance, features, and portability for an exceptionally wide range of applications. A newly designed class D amplifier delivers 250 watts of clean, dynamic power via a high-performance 10-inch cone woofer and 1-inch titanium-dome compression driver that match up perfectly for smooth, uncolored response from 55 Hz to 20 kHz. The woofer has an oversized 2.5-inch aluminum voice coil-a size you'd normally see on a 15-inch woofer-that contributes to outstanding sound and durability. With all this power and performance the big surprise is how light and manageable this advanced powered speaker is.