I got this as my first car.... it has navigation backup camera paddle shifters and aluminum trim. I tried to play the radio today and no sound came out. I have the "Studio on Wheels" system. Today was the first day I tried to do anything with the audio. When I use the touchscreen little beeps come out of it. Could it be possible that someone stole my speakers and now i can't get any audio? How much do replacements cost and where do I get them? Thank you