@SlowX6M yes you are right. They are the same 4" speaker but have different brackets or bezels. I'm fairly sure that all e70 audio systems use the smaller bracket type in all speaker locations. Like I said though the bigger bracket fits in the front door of my e90 335d so I'll be using them in my e90 with a set of infinity tweeters.
Yes that would be nice to know the impedance of the b&w tweeters to see what the final impedance would be using both speakers in parallel...
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2011 335d tuned by B.R.R.
2011 X5 35d tuned by B.R.R.
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