Originally Posted by brotow

My 2005 srt (3 weeks new to me) Infinity Modulus radio "aud" and "opt" buttons don't seem to work. Nothing happens when they are pressed or even held down for a few seconds. I found this out when I thought the radio should sound better ( lacking bass and fidelity sounds crappy) that's how I found out I couldn't change the audio settings, bass or treble the cds sound descent. Any hints?