Audio Systems: factory amp, infinity system, infinity sound

Question
my factory speakers dont seem to have any bass i have a chrystler 300m 2001 i was wondering if the factory amp is working but if it is not will the speakers still work and how do i check to see if it is working

Answer
hi; the infinity sound system comes with 6x9 woofers in the doors and small spakers on the dash   i never seen te amplifier go bad but i have replace the door speakers couple of times
it will be better if you find the original speakers  aftermarket don't work good with the infinity system