4 Ohm 15 driver for QR15a (178.205UK)A range of chassis speakers to replace the main driver in the QTX Sound QR series active cabinets.Vented magnetsSpade terminalsPower max. - 500WPower rms - 250WMagnet weight - 1.417kg (50oz)Magnet size - 20 x 156mmDiameter - 38cm (15)Voice coil - 62mm (2.5)Freque