Audio Systems: 1999 Dodge Ram Intermittent Speaker, dodge ram 1500, replacement speakers

Question
I have a 1999 Dodge Ram 1500 Quad Cab 4x4 I baught used.  I noticed my passenger side speaker stopped working one day and then started and has been going in and out.  My mechanic found a TSB specifying this issue.  The recommended repair is to buy the repair kit for over two hundred bucks.  I wanted to know if I can just purchase a regular speaker and replace it.  The problem is that the current speakers are amplified.  There is a cluster of wires coming into the mini amplifier which is affixed to the back of the speaker.  I need to know how to remove the amplifier and if it is okay to try to use a regular speaker aftermarket.  I also noticed that if the speaker is not screwed into the door, the rear speaker does not work, however when you re-screw the speaker back into the door the rear speaker works fine, almost like it's grounding out.  Can you advise me on this issue.  Thank you.

Answer
Will need a professional in person to see if that is possible with a regular old speaker.

If you plan on keeping the truck for five years or more, I would suggest replacing the entire system since it may break somewhere else the next day after going through all this trouble.

For not alot more than 200, you can upgrade.

I would use:
Moderate head unit at Walmart. 50 watt four channel Am/Fm/CD/MP3 with cd-r/rw so u can play up to 256 tunes per cd. Well under 125.00, mine was 79.00.
Installation kit and wiring harness adaptor for about 20.00, again at Walmart/Circuit City.
Efficient Polk audio replacement speakers will round out the deal. Spend as much as you can afford on the speakers.
http://www.crutchfield.com/ for more info on your trucks' needs. They cost a bit more, but sound awesome and will probably not require additional external amps due to thier sensitivity.
They DO offer pigtails and free adaptors but I would still filter the search for non-Infinity equipment if you are going to replace it all.
Of course the sky is the limit, but this would give you a great basis that will last along time and can be upgraded easily if needed. Guaranties are a nice thing too.

The choice is up to you. You can get speakers from crutchfield FOR your existing Infinity system, but a decent pair can be 350-500.00.

Good luck,
Jerry Mael