The PAX65-4 delivers unparalleled performance in a 6.5-inch pro audio driver that is extremely powerful and lightweight. Engineered to be efficient without sacrificing power or performance, this driver utilizes an extremely efficient neodymium motor, which is complimented by a 2-inch KSV high temperature voice coil. This speaker also features a custom tooled aluminum heatsink for added thermal cooling, and high quality push terminals for an easier connection. Single 4 Ohm voice coil configuration. Frequency Response: 85Hz - 8 kHz. Sensitivity: 94.8 dB. Sold Each.