Sound Waves in Parsippany, NJ. Professional start to finish, OEM installation and warrantied. I followed their recommendation for a new amp (under the passenger seat), replacement sub between the seats, a bit of sound deadening Dynamat to address some rattles in the sub enclosure, and a new head unit (the stock one had broken.) Wow – the sound is so clean, very clear, all on stock speakers. Best money I’ve spent in a while.
