4 Ohm 10in driver for QR10a (178.203UK)A range of chassis speakers to replace the main driver in the QTX Sound QR series active cabinets.Vented magnetsSpade terminalsPower max. - 200WPower rms - 100WMagnet weight - 850g (30oz)Magnet size - 18 x 110mmDiameter - 25cm (10)Voice coil - 52mm (2)Frequency