Bookshelf speaker satellite speaker on wall speaker series magnat symbol pro power rating 80 watt effective output 200 watt system 2 way system principle passive frequency response 35 30000 hz noise level 90 db impedance 8 ohm crossover frequency 4000 hz recommended amplifier power 20 200 power supply passive housing surface veneer housing material plastic enclosure speaker enclosures wall mounting possible bass reflex number of subwoofers 1