HiFi vs Harmon Kardon Custom Upgrades?
I'm looking into getting the base HiFi system in the 2023 m240i upgraded to a custom audio solution.
The hifi has fewer speakers built into the car than the HK system, so I'd assume that a custom solution building off the hifi would be less good than a custom solution building off the HK.
Any knowledge or experience about this? How big a difference does it make?
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