Question about Alpine MRA-F350 Car Audio Amplifier

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No sound from speakers after mra-f350 connected to alpine w205

I just connected the alpine mra-f350 to my W205 head unit via the AI Net cable, then connected the power and speaker leads to the amp.  The amp powers up, but no sound will come out.   Tried to see if something had to be turned on / set on the head unit by going through the source menus, but nothing worked.   any idea what the problem could be?

Posted by joenopro on

  • joenopro Oct 28, 2007

    On the W205, there is a setting under SYSTEM - OPTICAL OUT, which the user guide says is the Digital Output.  It was set to ON.  So i tried to set it to OFF, set ACC to on, then set it back to ON, and repower, but still no sound.   Are you talking about another setting which is external on the unit?   I appreciate your help.

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Did you set the digital output to the on position on the bottom of the head unit?

You have to switch the head unit off then back on for it to recognize the position of the switch.

Posted on Oct 27, 2007

  • Anonymous Oct 28, 2007

    That's the switch I was talking about. Try to find a local Alpine dealer. Even if you didn't buy it from them, they should help.

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you can follow this link to the alpine amp
http://www.crutchfield.com/p_500MRAF350/Alpine-MRA-F350.html?tp=115

hope this helps

sincerely
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