I had problems hearing the stock speakers at highway speeds; however, after I added HogTunes speakers and amp it was much better. Then, I added the HogPod and now, I have zero problems hearing crystal clear tunes (from the iPod) at 80 mph. The HogPod makes the "highs" much much easier to hear. I do have a buddy that swears wearing earplugs helps him hear the radio but I do not wear them.
You kind of missed the point of my post.
I have no problem hearing the tunes at highway speeds either when I DON'T wear ear plugs. I just think for the hearing protection I want to wear the plugs more often when I'll be cruising for extended periods at highway speeds and this is when the inexpensive drug store type plugs cause the music to sound muffled and/or distorted.