Optimus-500 Speaker (400-4055) Specifications Faxback Doc. # 14871 System Frequency Response:............................................60-18,000 Hz Power Handling Capacity:..........................................100 Watts Impedance:...........................................................4 ohms Speaker Complement: Loudspeakers:.......................3 1/4" (8.2 cm) Anti-magnetic woofer 1/2" (1.1 cm) Anti-magnetic polyethrimide dome tweeter Subwoofer:..........................10" (24.4 cm) Dual Voice Coil Driver Dimensions: Loudspeakers:.......7 1/2" x 5 15/16" x 5 15/16" (19 x 15 x 13 cm) (HWD) Subwoofer:...11 3/8" x 17 23/32" x 14 31/32" (28.9 x 44.8 x 38 cm) (HWD) Shipping Weight:.....................................................31 lbs Electrical Type:...............................................Bass reflex (subwoofer) Input Power:...................................Nominal 80W Max (music) 160W Impedance:....................................8 Ohms +/- 15% (at 100 Hz 1V) SP Level:......................................89 dB +/- 2 dB (at 1W 1m Hz) Resonance (Fo):............................................30 Hz +/- 6 Hz V Frequency Response (Fo):........................Hz-220Hz Deviation 20dB Max Cabinet Thickness Cabinet Body:.................................P.B 15mm BLACK Color # CB-123 Baffle Board:.................................P.B 15mm BLACK Color # CB-123 Back Board:........................................................P.B 15mm Front Frame:..................................................30 mm PLASTIC (ALL/all-08/24/95)