Your amp life might shorten, 2 ohm load makes it run hotter, if you were playing the system painfully loud. Yes, the wattage would be a bit more than that at each speaker, 2 in parallel on each channel. Pioneer is one of the first car audio makers, they made a Supertuner with cassette or 8 track back in the 70's..
Ebay, supertuner underdash 
