In wall speaker ceiling speaker series indiana line rd system 2 way system frequency response 50 22000 hz sensitivity 92 dbmw impedances 4 6 8 ohm crossover frequency 4000 hz recommended amplifier power 20 60 colour white speaker enclosure without casing number of tweeters 1 treble chassis 24 mm number of subwoofers 1 bass chassis 165 mm width 230 mm height 105 mm weight 14 kg area of use living room installation options ceiling m