JBL Factory Speaker Replacement Horn Diaphragm 2452H-SL, D8R2452-SL JBL Factory Speaker Diaphragm part # D8R2452-SL. Specs: Voice coil: 3.93" (100mm), Diameter: 5" (76mm), Impedance: 8 ohm, DCR: 4 ohm Factory AUTHORIZED service and parts. FREE technical support. FAST & FREE shipping to any USA address. SUPERIOR quality, LARGEST selection, and the BEST prices!