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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > BMW Coding > Hifi Coding for Alpine Retrofit



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      06-11-2017, 12:00 PM   #1
Digitalize
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Hifi Coding for Alpine Retrofit

After having my Alpine retrofit fitted for over a year I finally got it coded, $676 added to Rad2, VO readout confirmed it was there. I don't notice a huge change in audio quality but I'm not sure how dramatic it should be.

Few questions:

- Everyone seems to complain that there PDC gongs become much quieter after coding to Hifi, but mine sound identical?

- Do you need to change the wiring/Amp switch position when coding to Hifi? It was all plugged in as was correct for my Professional HU but not sure if it needs to be changed now? I can't remember what the option was for.
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      06-11-2017, 01:34 PM   #2
ctuna
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You should have noticed a change in the volume settings.

http://www.e90post.com/forums/showth...ighlight=graph

http://www.e90post.com/forums/showth...3#post11321493

Last edited by ctuna; 06-11-2017 at 02:12 PM.
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      06-11-2017, 03:02 PM   #3
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The switch on amp should be moved to other position, otherwise bass will be weak
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      06-11-2017, 05:55 PM   #4
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My hidden menu looks nothing like that, my head unit is a Pre-LCI.

Not 100% sure what the coding guy did but I'm not sure it's done anything, need to research more.
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