AMP Retrofit

[andres ch]

I have a 2011 e71 with the hi fi speaker system.. I'm an audio fanatic and the sound emitted by the speakers was "awful" .

After doing a lot of research I found this ;http://www.bimmer-tech.net/shop/bmw-...udio-retrofits.. Initially I was was sceptical about it, because I thought that the problem was based on the speaker and not on the amp. I decided to give it a chance and... the results are awesome... Right now I'm able to feel the subs below the forward seats, and also able to equalize each of the speakers.. superb...
In addition. Patryk the guy from Bimmertech is very open and is always in contact to help with any question..

I sincerely recommend this..