The WHARFEDALE's EVPX12 is a passive speaker that comes with a 12-inch bass driver and a 1.7-inch Titanium diapragm compression driver. The crossover is made with high-quality components and has the Protech driver protection system, which protects the HF driver from destructive signals generated by overloading and returns the system to normal operating levels flawlessly. It contains a visual signal presence indicator as well as overload LEDs for monitoring speaker status.