I can hear my music at 70 and 90 mph, but it is not LOUD like I want. My phone and packtalk easy to use volume roller each effect sound separately, so that helps with turning up the volume. In the sense that one does not lower the volume on the other, each turn up or down the volume separately. On a MP3 player that you could download the music loudly I'm sure it would make a big difference. It's also nice that as you reach full volume on the pack talk you hear a beep, so you don't keep turning the roller over and over with no change.
I should point out that I agree with others in that if you are not talking to other Riders it's probably not worth the money. But it is great that it does not talk to other packtalk Rider's using Bluetooth, it actually uses its own transmitting signal. It will Bluetooth connect to a Sana but never seems to work very well for me.
I have been in a pack of 25 or so Riders through a Mountain Road where I was second to end talking to the lead guy 3 miles away.
I wear a half helmet with the speakers in the fabric that covers the ears, no ear plugs, behind a windshield.