I have the BMW headset system installed, and I can hear it just fine with the earplugs in. I had to turn the volume up a bit, but that is all. If I wore it withour earplugs, I would no doubt have to turn it back down. On the BMW integrated volume I went from a volume level of 10 to 13 when the earlpugs went in. Please note, however, that I am not listening to music. GPS or intercom only.
Great feedback! I really just want it for the GPS.. I have plenty of songs playing in my head anyway.. plus all the voices in there..