M5: BMW 4 Dimension Car Audio Install Leave a Comment / Audio, Custom Fabrication / By Ultra Auto Sound Brand new F10 M5 Build Process Subwoofer firing forward to avoid trunk rattle JL Audio W6 subwoofer visible through ski hole. Suede Panel with Acrylic glass to see the impressive subwoofer. Lots of trunk space still available.
M5: BMW Sound excellence Leave a Comment / Audio / By Ultra Auto Sound M5 with a super clean audio upgrade. Three JL Audio slash amplifiers powering the focal speaker components & the Logic 7 system to get better sound. Amplifiers being installed in a stealth location. Nothing will be visible. Focal Kevlar tweeters replace the harsh metal tweeters Focal K2 Power 100KRS component system replacing the front and rear speakers Focal Badge. The only visual sign of an upgrade. Rear speakers with the factory grill off. Looks like OEM.