Just completed my audio install in my 07 R/G, Kenwood Marine head unit & CV B52 AMP, 4 Polk in fairing speakers 2 x 6.5 & 2 x 5.25 Marine Speakers. Bass is there just can't use it, sounds like a can full of marbles with the fairing on. Way to much vibration of plastic parts. What's everybody doing to brace up all this crappy thin plastic ? I did add a 1/2" thick ring to the lower fairing 5.25 speakers, but it's the 2 top 6.5 ones that's causing all the vibes.