Yeah, I looked into that and there are ton's of sound processors, equalizers, etc...out there. But that's a quite an expensive undertaking. The few I looked at, all convert the speaker level inputs into line level inputs, while EQ'ing them in the process. Not bad....but since the outputs are line level, we'll need an amplifier to boost the sound back to speaker level outputs. Amps need more wiring for power and tap into the control circuit....which might overpower the stock speakers, so I might need new speakers too...
My biggest gripe, is that my 2SS is a lease. So hacking apart the factory Bose connections,amps...and wiring up possibly 2 grand+ worth of gear, just to correct the sound, that's not in my cards.
Now if someone were to design a module that uses the factory connections out the Bose amp, and A) is directly swapable with the bose amp with no issues or B) can be put in after the Bose amp and corrects the sound, before the speakers .....I'd be sold.
Maybe I'm being too critical of the bose system, but coming from my 2008 A4 which just had the basic sound system in it, it's disappointing. I put an aftermarket headunit in it 3 years ago to get iphone functionality and it sounded even better. No sub, just the stock rear deck little woofer, stock speakers, no amp.