In my stang I have added two 12' Rockford XLC's and two pioneer 4-way 6x9's with seperate custom boxes for both sets. The 12's are being pushed by a JBL 600watt power seris amp and my 6by9's by a 200watt pioneer amp. Everything else is stock, but boy does it ever sound good. I had gone to an audio installation center and they had said that adding to the Mach system was not a good idea cause they had done it before and it did not sound good. Man were they wrong after I did it myself I went back and let them see what I had done and how it sounded and they were surprised. I sure miss my trunk though but hey I can live without it.
In my T/A I have a JL Audio stealth box with a 10' JL Audio and a PPI amp pushing it with 300watts, with the mansoon system stock. Sounds nice also. Don't have a digital camera or else I would post pic's may be next time.
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1999 Metallic Blue Pontiac Trans Am
MAF, K/N and Whisper Lid
2000 Silver Ford
Mustang GT
B&M ripper shifter