Build Thread. I've ordered an I4 M50 WITH the upgraded HK sound system. I really appreciate a good sound system in my car and always listen to music while driving. But the dealer has a car arriving soon that they've offered me that has the same specs except without the HK sound system. I am considering getting that car.The basic HK amp will power the in car speakers just fine, the subwoofer amplifier cannot power an aftermarket subwoofer all too well but the one thing to note, the car does track movement speed and will increase power to the speakers that you have with both the aftermarket amplifier as well as the stock ones. As any BMW Harman Kardon sound system review would agree, Top Hi-Fi is a. significant improvement over the BMW HiFi speaker system. For anybody looking. to upgrade their system at a later date, the fiber optic amplifier connection. means most popular aftermarket amplifiers on the market will not be. Upgrade - Loudspeaker system BMW advanced , 205W amplifier and 12 speakers, including 2 subwoofers under front seats. £395. Upgrade 2 - HK, 600W, 16 speakers. £895. Upgrade 3 - B&W which is £3750!! For that I'd want it to make my breakfast in the morning! Sure it's amazing though.
Partnership. Enjoy every dimension of your drive with Harman Kardon in Chrysler. Expertly designed to complement each model’s unique interior in terms of both sound and style, this system delivers acoustic perfection that you and your family can feel. Wrap yourself in beautiful sound and be drawn into the moment as you travel the open road.