Boss Audio - MR4.3W 4" 3-Way Marine Box Speakers - Pair - 200W - White - MR4.3W. Boss Audio's 4" 3-way 200-watt Marine Enclosed System Speaker.. Features:. Speaker Type: Enclosed System. Configuration: 3-way. Swivel Brackets. Color: White. Standard Warranty: 1 Year. Specifications:. Woofer Size: 4". Tweeter Size(s): 1", 1". Midrange Size: 4". Peak Power Handling: 200 Watts. System Impedance: 4. System Sensitivity (1W/1m): 85 dB. System Frequency Response: 80 Hz to 18 kHz, +/- dB. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.