AV-JEFE Replacement Diaphragm For JBL 2440 2441 2445 ND2445 2446 2447 2450 ND-250 375 376 Aftermarket Replacement Diaphragm for JBL Part# D8R2445 Diaphragm Handles Same Amount of Power & Sounds Just Like the Original JBL Diaphragm Fits on JBL 2440, 2440H, 2441, 2441H, 2445, 2445H, 2446, 2447, 2450, 375, 375H, 376, 376H, SRX Series... Horn Drivers. Easy to Install with Simple Hand Tools and Require No Soldering. * Good DCR Rating: 6.03. * Overall diaphragm diameter 5" (127mm). * Voice Coil Diameter: 3 15/16" (99.2mm). * Mounting Holes: 1 3/4" (45mm), center to center. * Material: Titanium Dome with Aluminum Edge-Wound Voice Coil on a Kapton Former.