SS Audio Cerwin Vega, Pyle, Heppner Replacement Speaker Diaphragm 3910, 9284, 9301, D-417 Premium SS Audio replacement diaphragm for many Cerwin Vega horn drivers. Specs: Voice coil: 1" (25mm), Diameter: 2-1/4" (57mm), Length: 3" (76mm), Impedance: 8 ohm, DCR: 6 ohm SUPERIOR quality, LARGEST selection, and the BEST prices! FREE technical support. FAST & FREE shipping to any USA address. To get the BEST quality repair parts, be sure to buy ONLY from SS Audio and Simply Speakers. Thank you!