Ok I was thinking about running an amp to some 3way pioneer speakers I have in my ext. cab Toyota Tacoma. The speakers bass quality drops significantly when I get towards the top end of my volume. I thought I might be one of two things 1) my speakers are just pieces of crap 2) the more I stress the head unit I have for wattage to each speaker, it doesn't have enough juice to supply a clean quality note. So I am wondering is this what is wrong an should I get an amp to run them to have sufficient power so I'm not running my head unit to the ends.