Originally Posted by Moonbeamromance
Posted in the wrong spot I see.
I have a 2008 Crossfire Roadster LTD which came wit Infinty Modulus Audio System, AM/FM stereo radio, CD player, 6 channel 240 watt amp and six speakers, including dual sub woofers. Hate the sound.
Is the problem my amp, or the system itself? Tried a Nissan 350Z Roadster with a Bose Sound System that was great.
Help?? 
It's a combination of poor engineering/setup and the OEM (Infinity) headunit really not being very good.
A simple and cheap fix is to install the capacitors as this thread mentions. I have replaced my head unit with a Pioneer ($150) and really love it. I also ended up replacing the door speakers with Infinity Reference for ~ $50.
All of these things make a big difference. Start small. Stop when you are happy!
If you need capacitors, I will send a pair to you for $6 ready for install.