The Pioneer TS-A4671F 4"x6" - 4-way Coaxial Speakers can handle up to 210 Watts Max Power (30 Watts Nominal). The tweeters are made up of a polyethylene terephthalate (PET) 11mm tweeter, 11mm super tweeter, and 1-5/8" cellulose fiber cone midrange. The 4" x 6" woofer cone is made of up carbon and mica reinforced Injection Molded Polypropylene IMPP. | Pioneer | | 4" x 6" 4-Way Car Speakers Carbon/Mica-reinforced IMPP cone (Pair | Black | Best Buy