Scuderia Audio presents a high end upgrade path for the small, paper coned speakers in the rear side panels of the 612 Scaglietti.
The speakers are replaced with Morel Carbon Fiber 6 1/2 inch midrange/mid bass drivers with silk domed one inch tweeters. The stock sheet metal speaker tubes are replaced with thicker, 3D printed nylon tubes that have a larger throat to accommodate the 6 1/2" drivers and are less prone to resonating. These pieces lock into 3D printed adapter plates with gusseted mounting points to the car and brass threaded inserts for the speakers.
Absolutely no modifications needed to the car whatsoever.
This system represents the pinnacle of high end sound quality for your 612 Scaglietti.