M4: M Power with MMMMuch better Music Leave a Comment / Audio, Custom Fabrication / By Ultra Auto Sound Doors all open for the sound upgrade Focal 100KRS vs original Looks great and sounds amazing! Hidden amplifiers under the rear shelf. Amplifiers driving all speakers including speakers under the driver and passenger seats. Helix DSP used for time alignment and sound processing. Great space in the trunk for a subwoofer. Focal Flax subwoofer fits nice and hidden Share This:FacebookTwitterEmailLike this:Like Loading... Related