I just installed the HD accessory 7 pin headset connector harness. I have an old Arai com helmet I used when I had an 07 UC & I connected my ipod via usb. My volume is a bit too low even at full max. (I had plenty of volume with the exact hardware on the '07 w/ the factory HK excepting the ipod is new). I do get excellent volume from the ipod through the front speakers. I need to improve. Any ideas - suggestions from the experts ?