Screw on Compression Driver. 1.375″ ThreadImpedance: 8 Ohms Power Rating: 40w RMS Frequency Range: 800Hz – 20KHz Dimensions: 98 x 51mm Weight: 890g. A screw on compression driver for use in full range cabinets. The Driver5 is rated at 80W rms and has a frequency range of 800-20KHz. The thread size is 1.375″ so will fit most horn flares. This is ideal for replacing a blown or faulty unit.. horn driver-replacement horn driver-horn driver spares