Introducing the MS-OS420 4" 2-Way Full Range Box Speakers. These versatile speakers are designed for use in various applications including on board your boat or outside your home. Perfect for allow boats where flush mounting isn?t always practical. Featuring 100 watts peak power output and an adjustable wall bracket, the MS-OS420 speakers are the perfect complement to any FUSION stereo system. FEATURES Woofer Type: 4" Polypropylene/NBR Surround Tweeter Type: PEI Cone Box Type: Sealed Peak Power: 100 Watts RMS Power: 25 Watts Efficiency (1W/1M): 86dB Frequency Response: 80Hz - 20kHz Impedance: 4 Ohm Mounting: Adjustable Wall mounting bracket included