Kenwood SW-900 Super woofer bass speaker

Taking a closer looks at the drivers (Ohm rating & size) Each driver measures 17cm total diameter & 8.5cm deep. Foam 1.5cm end to end (not stretched out) My multimeter reading at 200 ohm setting showed 9.2 ohms per speaker. Combined in parralel I got 4.8 ohms. Specifications The Subwoofer (SW-900) is output: 70 W (50 Hz, EIAJ 10%, 6 ohm) Frequency response: 20 Hz to 60 Hz, 90 Hz, 120 Hz Phase switching: NORMAL, REVERSE Input sensitivity & input impedance: RCA-type pin-plug jack: 100 mV / 70 W 6 ohm, 5k ohm Push-type terminals: 1 V / 70 W 6 ohm, 12k ohm Supply voltage: AC 110 - 120 V~, AC 220 V~, AV 240 V~ Rated power comsumption: 80 W