Audio30 usage question

[Kieran28]

Can anyone tell me what the icon shown in the attached picture is?

I just installed a new Audio30 into my 2002 210 wagon. While I was programming radio stations, all of a sudden, the sound turned to crap, and this icon showed up. I cycled through the "AUD" adjustments, and treble had gone all the way up, bass all the way down, balance all the way to one side (forget which) and Fade all the way to one side (forget which). Upon adjusting all those settings back to nominal, the sound was fine again, but the little icon remained.

Anyone know what this means? The owners manual from becker doesn't mention it at all, even though I took the attached image from the cover of their owners manual.

Thanks!

[raverx3m]

looks like either a tape or telephone icon.

you might have pressed telephone and it adjusted settings for speakerphone