JBL Factory Speaker Replacement Horn Diaphragm 2446, 2447, 2450, 2451, D16R2450 JBL Factory Speaker Diaphragm part # D16R2450 for JBL 2446, 2447, 2450 horn drivers and many others. Specs: Voice coil: 3.93" (100mm), Diameter: 5" (76mm), Impedance: 16 ohm, DCR: 8.5 ohm Factory AUTHORIZED service and parts. FREE technical support. FAST & FREE shipping to any USA address. SUPERIOR quality, LARGEST selection, and the BEST prices!