Satellite speaker series jbl control effective output 200 watt system 2 way system principle passive frequency response 50 20000 hz noise level 89 db impedance 8 ohm recommended amplifier power 100 power supply passive colour silver front colour silver housing material plastic enclosure speaker enclosures bass reflex magnetically shielded wall mounting possible removable speaker cover number of tweeters 1 treble chassis 12 mm number of midbass