Originally Posted by cheshirecat

You can replace the Bose HU. It's not too bad.

When I put an aftermarket double din (Pioneer AVH8400) on my Bose system, it made a HUGE difference.

IMO, the weakest link in the Bose system is the head unit itself. The system really woke up after swapping it out.

Of course, it's nothing compared to a full aftermarket setup, but for what little work is required to change out the HU, it was a huge difference.