Sure, power is power. I'd worry that mechanically an antique PA woofer wouldn't really handle all that much power before the cone, surround, or spiders fail, and I suspect a woofer like that is designed to function properly in a bass bin/horn or refrigerator sized enclosure so performance, even if it's in perfect condition, would be lackluster if the correct enclosure will not fit in a vehicle.Can I use this antique with a car audio amplifier or not