Hey guys just fitted my AndyMac stealth Sub and amp in my s3, and what a difference it makes! Albeit it took my a while to install, with a few workarounds, the instructions are to the tee. Dynamatted as much as i could there, got a good crisp sound. takes alot of pressure off the fronts and rear speakers. A definate recommendation to those out there that dont want to compromise boot space, especially in quattros. Compared to the old bose sub, i can now put my music up louder and not have to hear the farting in the back!