Seismic Audio SA-DR6-16 Ohm Replacement Diaphragm - Compatible - JBL 2425, 2426, 2427 and 2420 Driver Model: SA-DR6 Contents: Replacement Diaphragm for JBL 2425, 2426, 2427 and 2420 Compression Drivers Nominal Impedance: 16 Ohms Compatible with the following JBL Compression Drivers Drivers: JBL 2425, 2426, 2427 and 2420. Additional Features: Titanium Dome