My first post! I couldn't find anything in the search. 
  
2011 SE AWD with base model stereo. 
  
I installed a new set of Pioneer 6x8's and a Polk 4ch amp and man does it sound awesome! 
  
My only issue is when I turn the key to "accessory mode" it says "low battery audio off" so the radio doesn't turn on until the engine starts and also turns off right once I take the key out of the ignition rather than staying on until I open the door.  
  
Just to proactively cover the typical audio questions 
-Car starts and drives just fine. 
-No issues while the engine is started. 
-It is grounded well, I have zero feedback in the audio and the amp stays cool. 
-I wired the ignition wire to the #35 fuse by the foot panel. 
-I ran two "4 gauge" (looked a little small for 4 gauge so I ran another) power cables and have two grounds at separate locations . 
-The power cables are bolted to the battery terminal connector. I made sure not to connect them after any factory fuses, each power cable has its own fuse. 
-Amp is mounted under the drivers seat (no power seats) so the cables are fairly short. 
  
Its not the worst problem in the world but if I can fix it I would like to. Thanks in advance! 
  
Travis