Aftermarket 18″Woofer Speaker with 4″Voice Coil at 4 Ohms. Mackie SWA1801 & SWA 1801Z (Speaker Only). P/N 0012184, LC 18/4003-4. High BL Low Frequency driver with deep, punchy bass. 4 Diameter inside/outside copper voice coil on fiberglass Former. Forced air ventilation and 15 mm top plate for minimum power compression. Dual spider design with silicon-base […]... Read More