The Infinity 6032si features a 150 Watt, injection molded polypropylene cone woofer, rubber surround and dome tweeter. - 150 Watt Max - 50 Watt RMS - Rubber Surround - Injection Molded Polypropylene Cone Woofer - Dome Tweeter - 4 Ohm Impedance - Freq. Response: 53-21000 Hz - Sensitivity: 91dB - Product Condition: Brand New - Part Number: 6032si Grills and screws are not included! Series: REFERENCE Type: 2-way Speaker Woofer Material: Polypropylene Surround Material: Rubber Tweeter: Dome Tweeter RMS Power: 50 Watts Sensitivity: 91 dB Frequency Response: 53-21000 Hz