SS Audio Yamaha Speaker Replacement Horn Diaphragm NB074960, 4201, 4207, 4208, and many others Premium SS Audio replacement diaphragm for Yamaha JAY-4201, 4207, 4208 horn drivers and many others. Specs: Voice coil: 1-5/8" (42mm), Diameter: 2-3/4" (70mm), Impedance: 8 ohm, DCR: 6.1 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!