Hidden Equalizer?
#4
There was a post a few years ago in the A6 forum about a hidden set up for the Bose. I can no longer remember, but I think I tried the button sequence and nothing happened so it could be model/year specific.
#8
You can't access the hidden equalizer, its only on Sympthony 1 modes on the B5 A4. The sympthony 2 models can't do it. How you would access it is by pressing and holding the number 5 button while turning it on, this would have brought up a 555555555 indicating the equalizer is set to a flat setting.
#10
hold the menu button for 5 seconds with the radio on and it will bring up "hidden" settings. The only useful one is the max volume control, it goes up to 15 and it set at 10 from the factory.