The Audiophile Experience on the Waves There is no substitute for a premium marine ready speaker in a wet environment! Alpine's SPS-M601 16,5 cm 2-way coaxial speakers are specifically designed to add the ultimate listening pleasure to every maritime cruise. Designed for high power handling, these speakers are ready to embark on an expedition into great sound. FEATURES Crossover Network Crossover Type: Built-in Tweeter Protection Woofer Frame: High Temp ABS Frame Cone Material: Poly-Mica Woofer Cone Grill Cover Type: Ultra UV (Centrix 813) Resistant Grill Tweeter Magnet Material: Neodymium Magnet Application Type / Design Detail: Internal / Fixed Tweeter Tweeter Type: Titanium/PEI Balanced Dome Tweeter SPECIFICATIONS General Sensitivity: 89dB / W(1m) Impedance: 4 Ω Frequency Response: 50Hz - 20khz Dimensions Woofer Mounting Depth: 2-27/32'' Woofer Mounting Depth: 72.1mm Woofer Mounting Diameter: 5'' Woofer Mounting Diameter: 127mm Woofer Diameter: 6-1/2'' Woofer Diameter: 165.1mm Power Handling Power Handling Capacity (Peak): 100 Watts Power Handling Capacity (RMS): 30 Watts CEA-2031 Power Rating: 30 Watts