If you don't mind losing some cargo space and you want good sound in your Beetle a good option is to add a rear speaker shelf. These can be custom made with fiberglass or wood covered in vinyl to match your interior but you can also buy them in a few different vinyl options already made. I picked up this one because It was on sale and I liked the design enough that I didn't want to make a custom shelf. Installation is pretty simple and was easiest by having someone hold the shelf in place while someone else got underneath it with a sharpie to mark the spots to drill the screws for the L brackets (which by the way are not provided due to different mounting options) I installed into the shelf some 6.5" Rockford Fosgate T165 Power Series speakers and I put speaker baffles behind them and they sound much better then having them muffle the extra sound into the space behind the back seat. There is also Dynamat installed back there which helps quiet the engine noise very well as well as reduce vibrations from a subwoofer which i plan to install later. There will be more posts coming about the complete stereo system install including a subwoofer install and the speakers in the kick panels as well as a Kenwood KIV-BT901 headunit that plays videos and has built in Bluetooth.
