Just some thoughts here to use or discard as you see fit, about my personal discoveries using ear phones.
Earphones greatly improved both volume and clearness of my Sena 20S. I rarely need to turn up the volume more than a couple of clicks above minimum.
On the 20S, I greatly reduce the chance of unplugging the head phones cord while under way if I wrap it up and over behind the flip up antenna and down the back side of the Sena unit. It is not impossible to plug it in while underway, but it's impossible to do it without a safety risk. Depending on your gloves and dexterity level it just isn't that easy to do even when stopped with the helmet on.
Regardless of which ear phones you use, try to find some silicone tips that have the
three sections as opposed to
foam tips with only one. They stay in better and seal out noise better..at least in my ears.
When purchasing tips, try to find ones that are available in different colors. When all your friends are just about to take off and you are still trying to figure out which plug goes in which ear, it helps if they are different colors. (I buy
Plugfones tips for my Shure plug phones)
Before riding be extra diligent in ear cleaning. Ear wax seems to move from inside the ear towards the outside and dries out as it exits into white flakes that look much like dandruff. Most plugs will seal well without the extra cleaning, but they do push some of it back in to the ear canal during insertion. In my case that seems to occasionally cause an extreme itching sensation in one ear or the other which is not only unpleasant but the distraction can be a safety hazard. Extra cleaning before riding has eliminated this problem for me.
If you are an average person you probably will have no problems adapting to any brand of plugs. If however you a klutz like me, you will catch the plug cord on everything imaginable, brake reservoirs, bike mirrors, jacket zipper, brake levers, well the list goes on...invest in plugs that have replaceable wires. I use Shure se215-K which have fairly robust wires and they loop behind the ear so that when I catch the wire on something, my ear becomes a shock absorber and I'm able to untangle the wire before it gets broken. I have yet to need a replacement cord but the possibility figured into my shopping choice. I do carry a spare set of cheaper plugs
(Plugfones) during my longer trips just in case.
Although it sounds gross (and maybe it is), the phone plugs can be inserted faster and deeper if you lick them first. What do you mean my ears have garlic breath? Hey you should smell my riding gear if you think that's bad, start with the gloves.