TECHNICAL SPECIFICATIONS FB830 FB840 FB850 FB860 GENERAL CONTINUOUS POWER: 100 Watt . 120 120 150 Watt... MUSIC POWER: .. 160 .. 160 Watt 180 Watt 00 Watt . AMPLIFIER REQUIREMENTS:.. Watt cont, power.. 20 100 Watt cont. power 20 100 Watt cont. power 30 120 Watt cont. power SYSTEM IMPEDANCE: 6 Ohm 80hm,.. SENSITIVITY:.. .. 87 88dB CROSSOVER FREQUENCIES! B50 Hz 7,000 Hz 800 Hz 7,000 Hz 800 Hz 6,000 Hz 500 Hz 5,000 Hz . FREQUENCY RESPONSE: wne 43 Hz 20,000 Hz... . 38 M2~ 20,000 Hz ..overcome.