I've got a '96 Saab 900SE for which I want to upgrade the audio. The stock head unit hooks up via a proprietary DIN connector to a crappy 17-watt amplifier, which powers low-range 6.5'' door speakers. The dashboard, meanwhile, has 3.5'' mid/high range speakers. There are also some 6x9s in the rear. The door speaker amplifier is dead, and the stock head unit ***** (tape player is even broken!) I'm planning on getting a Kenwood KDC-352U to replace it.
So, anyway, I thought perhaps I could install a component system, and put the midwoofers in the doors and the tweeters on the dashboard. Either power it directly from the head unit, or use a small 2-channel amplifier mounted where the old one was. I was considering a either a Polk DB6501 or Infinity 6030cs.
However, I also noticed that to buy two sets of Polk coaxial speakers, the DB651s and DB351, it would be about the same price as to buy a component system. This makes an amplifier necessary for the 6.5'' speakers, but isn't it better to have 3.5'' dash speakers instead of tweeters? Or does having full range coaxial speakers instead of midwoofers in the door compartment complicate things? I can't seem to find very many 6.5'' midwoofers, except for those included in component sets.