Hi-Fi Auto Speaker (400-1354A) Specifications Faxback Doc. # 7025 Impedence:..........................................................8 ohms Frequency response:...........................................50-14,000 Hz Free air resonance:..................................................50 Hz Efficiency (SPL at 1 watt, 1 meter):.................................90 dB Nominal Power:........................................................40 W Maximum power:........................................................40 W Magnet power:................................................10 oz (283 g) Speaker Weight:............................................30.6 oz (865 g) (smc-02/23/94)