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.
13 E93 M3 Melbourne Red DCT/Premium/EDC/NAV/220M wheel
12 E93 Space Gray ( Retired BMW buy back )
09 E82 Space Gray/Black int/Steps/Sport/Nav/Premium/Xenon/Phone Int/Hifi/269 wheel
2006 E90 ( sold )
My next vehicle would be a Zamboni