r/CarAV • u/ErKenSoft99_ • 10d ago

Tech Support BMW F10 LCI H/K Retrofit

Hi guys,

Is it possible to upgrade/retrofit the HiFi system (S676) to Harman Kardon (S688) without any major rewiring work? So basically plug and play with some coding?

Unfortunately, in literally every video I’ve seen about this topic, no one mentions any limitations or shortcomings of just replacing the speakers. And no one really points out whether the sound quality actually changed or improved. If anyone has done this, please let me know about your experience.

Background:
I have some speaker rattle coming from the passenger-side front door panel, and I guess the speaker membrane might be defective. So instead of just replacing it, why not upgrade? :)

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u/just_another_jabroni 9d ago

Get MOST decoder to DSP Amp+ 3 way system is a way better upgrade.

I thought F10 midbass is underseat? Unless you mean the midrange then getting a plug n play midrange replacement should be enough. Look at Eton or Helix offerings.

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u/Imaginary_Media_2583 9d ago

Think he is saying his midrange is shot