Quote:
Originally Posted by reisf
Because the Alpine Kit is for vehicles with the base stereo option only. The M135i has the HiFi stereo system as standard, which means you should already have front door tweeters and an amplifier whereas the base stereo option has no amplifier at all, and no tweeters.
This is one level better than the base and one step below the Harmon Kardon.
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Unfortunately my M135i definitely has the base stereo.
I have fitted some tweeters my self but it's still heavily equalised and shite.
Hence wanting the Alpine upgrade.