SS-Audio Diaphragm for Cerwin Vega CD-34A, 4 Ohms Premium SS Audio Diaphragm for Cerwin Vega CD-34A, 4 Ohms Specs: Voice coil: 1-3/8" (35mm), Diameter: 3-1/4" (83mm), Impedance: 4 ohm, DCR: 3.9 ohm, Aluminum dome with copper voice coil on aluminum former 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!