4 Ohm 8in driver for QR8a (178.202UK)A range of chassis speakers to replace the main driver in the QTX Sound QR series active cabinets.Vented magnetsSpade terminalsPower max. - 150WPower rms - 75WMagnet weight - 567g (20oz)Magnet size - 18 x 100mmDiameter - 20cm (8)Voice coil - 35mm (1.35)Frequency