My 09 128i had the equalizer built and sounds almost good as the M3 premium sound and I have to pay $1900 for this option, I can't the difference.
14 F30 335i M Sport Melbourne Red
13 E93 M3 Melbourne Red
12 E93 Space Gray ( Retired BMW buy back )
2006 E90 ( sold ) 09 E82 Space Gray ( sold )
My next vehicle would be a Zamboni