I just had the D3 installed,everything working fine, then after the car sat a few hours the Sub was not firing while listening to the Ipod, I didn't disconnect the Ipod just turned the car off and when restarted it this problem occured. I switched to tuner and the sub was working again, switched back to Ipod and all was well! Now this has happened twice, but it was fine again this morning. Is there a problem leaving the Ipod plugged in all the time? Thanks