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      12-31-2008, 12:05 PM   #5
GregW / Oregon
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Drives: 2015 M4 Coupe, 2012 ML350
Join Date: Nov 2005
Location: Lake Oswego, OR

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Quote:
Originally Posted by GT3 Tim View Post
Mine entirely shut down.....after about 5 minutes it worked fine.

I also had the "full volume rear speaker hiss" issue once. The car was garaged all night and OFF (stop switch hit twice). I merely opened my trunk and HISSSSSSSSSSSSSS....full volume rear speaker HISS. I then jumped in and started the car and could do nothing to shut off the sound. I finally ripped out the rear cover over the amp and unplugged the optical input, which killed it immediately. I could see a red light that was on inside the cable...then it flashed a few times, then went out. I plugged it back in and the sound did not come back on, and hasn't since. Strange. Although I do not think this is amp related, it is yet another premium audio gremlin.
When I had the full-volume hiss issue, they replace the head unit, and it has not recurred.
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Greg Lake Oswego, Oregon, USA
2015 M4 Coupe - Silverstone/Sakhir/CF
2012 ML350