Behringer Speaker Diaphragm Eurolive B-1220, B-1520, B-315D, 8 Ohm, D-SRM450 Premium SS Audio Diaphragm for Behringer Horn Driver Repair Specs: Voice coil: 1-3/4" (44mm), Diameter: 2-3/4" (70mm), Length: 4-1/4" (108mm), Impedance: 8 ohm, DCR: 6.5 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!