When i ordered my 15 road glide i had the audio system upgraded to boom 1 w/ 300 amp and added saddlebag speakers. I ended up putting on lowers and decided to add the speakers to them . It also requires another 300 w amp. At this point they (harley shop)are suggesting that i upgrade to the high output charging system and really really suggest it if i decide on running the boom 2 speakers as they reguire 2 channels each to power them. From there i checked with various shops in my area and most of them say that i should be ok as long as i dont add anything else that will put any more drain on my e system. If it was just a matter of a few bucks its a no brainer but its 500 + labor. Have any of you had a similar set up and chose to not upgrade the charging system? What was the outcome?