QTX QR Active Series Replacement Drivers 4 Ohm 10in driver for QR10a from Boxed2me at £36.25. 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 - 100WM