BMW 1 Series Harmon Kardon Alternative | Audison Sound Upgrade

BMW M140i recieving an OEM+ Sound upgrade using Audison speakers into factory Harmon Kardon locations, running from the stock head unit.
This upgrade brings greater sound as a simple upgrade from the base BMW sound system, and adds an Audison tweeter into the Harmon Kardon location for a stock look.
This upgrade has been carried out to the front of the vehicle, but can be added to the rear doors, sub and amp also.
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If you are interested in a similar install in your vehicle, please feel free to get in touch! :: CBS Automotive / Cambridge Car Audio::
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