The loudest car stereo I have ever heard was designed, built and owned by a guy in his 60's. In a Civic Hatchback. Beautiful install. WAAAYYY too loud, IMHO. But he had a reason - he was nearly deaf from construction work with no hearing protection!!!
My el camino has won several awards for sound imaging as well as SPL in my power level. However, at 300 watts you cannot hear it coming from down the block (darn V-Force mufflers) but 133db is plenty loud in the cab.
My theory - if you want it loud - design it so it is so inside the cab, not outside.
- Ryan
