If you have the four or six basic speaker system, I don't think so. The amps are up on the left driver kick panel. They have a 16 pin and a 22 pin connector on them. It is a little hard to see.
Well worth adding speakers and even better with an amp. I recommend installing 3.5's up in the dash as well, or at least the tweets from a component system. Then of course you'll need a sub, ....
I wrote a thread on my amp adventures, and also on my speaker adventures.
"Amplifier upgrade, thoughts and info-2nd gen"
"Speaker Replacement, Thoughts and Info"
You can search those and find some helpful info there.