Tweeter 25 mm (1”) TPTTD-I, TWG-I, TTP Midrange 133 mm (5.25”) TPACD-I, TRCS Bass 2 x 165 mm (6.5”) TPACD-I, TRCS Bass Passive 165 mm (6.5”) TPAPR-I, TRCS Recommended Amplifier Power 20~280 W Frequency Response 28Hz – 40kHz