Great for on your boat or outside your home. FUSION's Marine/Outdoor Box Speakers are carefully designed and manufactured specifically for marine/outdoor use. Featuring an adjustable mounting bracket with all mounting hardware supplied, these speakers are perfect for installation on a alloy vessel where flush mount speakers are not always practical. Box Type: Sealed. Cone Material: Polypropylene/NBR Surround. Efficiency (1W/1M): 86dB W/M. Frequency Response: 80Hz - 20Hz. Impedance: 4 Ohm. Peak Power: 100W. RMS Power: 25W. Woofer Size: 4". Tweeter Type: PEI Cone. Box Dimensions: 7"H x 10"W x 12"L. Weight: 6.3lbs.