Hifi audio is something that will not be a deal breaker for me. I understand why you want it. Haha i ordered it in my order.

Ive had high end after market stuff done to my previous bmw. So hifi isnt all that great but will be great for most people. The x5 will be for my wife so no aftermarket tinkering here.

Google JBL MS-8. Best thing you can add and instantaneously changes the staging and frequency balance. You can just piggy back this into any existing oem system and it can be disconnected later. It is a preamp equalizer that tunes and filters out diff frequency to optimize for driver aide or pass or both.

The problem with most oem system is their crappy paper speakers. Just cant produce clarity.

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2012 E70 X5 50i
2011 Prius
2010 GT3