12 driver for QR12 (178.212UK)A range of chassis speakers to replace the main driver in the QTX QR series passive cabinets.Vented magnetsSpade terminalsPower max. - 400WPower rms - 200WMagnet size - 140 x 20mmDiameter - 30cm (12)Frequency response - 45Hz - 6kHzMagnet weight - 1.1kg (40oz)SPL @ 1W/1m