SS Audio EV Diaphragm for Electro Voice ND2, ND2B, horn driver and many other models. Premium SS Audio Diaphragm for Electro Voice ND2, ND2B horn drivers and many other models. Specs: Voice coil: 2" (50mm), Diameter: 3-3/16" (81mm), Impedance: 8 ohm, DCR: 5.3 ohm, Titanium dome with edge wound voice coil on Kapton 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!