Floor speaker series magnat monitor supreme ii power rating 225 watt effective output 450 watt system 3 way system principle passive frequency response 18 40000 hz sensitivity 93 dbmw impedances 4 6 8 ohm crossover frequencies 350 3500 hz recommended amplifier power 30 450 power supply passive colour black housing material mdf enclosure speaker enclosures bass reflex removable speaker cover number of tweeters 1 treble chassis 25 mm tw