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Customer brought us their brand new 2015 Mercedes S550 and wanted to make it louder so we did exactly that! Equipped with 2 Skar Audio VVXv3 12" subwoofers in a custom enclosure powered by a Skar Audio SK1500.1 amplifier, we got the bass where it needed to be. After that we installed a Skar Audio 85.4 4-channel amplifier to get more out of the door speakers. This S550 is LOUD!!!