alpine type r 12 inch 2250 watt max 4 ohm round car audio subwoofer %7c r%2dw12d4 alpine general features:alpine 12" r series dual 4 ohm subwooferpower handling: peak: 2250wattsrms: 750 wattsrecommended power range: 300 - 750w rmscta-2031 compliant power ratingsparabolic pulp/kevlar coneh.a.m.r. surroundpolypropylene, mica and talc dust capreinforced cone neck and spider jointcast aluminum frame with integral shorting sleeve8awg push terminals with vc configuration jumpers2.6" high excursion overhung voice coil127 oz. strontium ferrite segmented magnettop-mount depth: 6-3/8"cutout diameter: 10-7/8"frequency response: 24 - 200hzsensitivity: 84.3dbresonance frequency (fs): 27hzauthorized internet dealer1 year manufacturer's warranty