Pioneer TS-A6983R 6-Inch X 9-Inch, 440-Watt 4-Way Speakers Woofers feature carbon graphite IMPP interlaced aramid/basalt fiber cone with polymer surround 1-inch soft-dome midrange, 5/8-inch film cone tweeter, and 3/8-inch silver PET film dome supertweeter Heat-resistant polyester-imide resin voice coil wire for improved power handling 6-by-9-inch, four-way speakers with 440 watts maximum power handling (80 watts nominal) Woofers feature carbon graphite IMPP interlaced aramid/basalt fiber cone with polymer surround 1-inch soft-dome midrange, 5/8-inch film cone tweeter, and 3/8-inch silver PET film dome supertweeter Heat-resistant polyester-imide resin voice coil wire for improved power handling 30 Hz to 31 kHz frequency response with 92 dB sensitivity