Behringer Eurolive B215, B1520, Speaker Diaphragm, 8 Ohm, D-34T30D8 Premium SS Audio Diaphragm for Behringer Eurolive B215, B1520, others, 8 Ohm, D-34T30D8 Specs: Voice coil: 1-3/8" (35mm), Diameter: 3" (76mm), Cap Depth: 1/2" (13mm), Impedance: 8 ohm, DCR: 6.5 ohm, Titanium dome with edge wound voice coil on Kapton former and ABS back cap 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!