Sena 20s Volume check

I just installed this Sena 20s in my new Schuberth C3 Pro helmet. Just checking / demonstrating the volume. It's plenty loud even with ear plugs at 75mph.

[stkout]

It's a pretty decent sound through the speakers but it's actually too loud with my ear buds. Oddly enough there's a minimum volume that must be maintained or it turns off the sound completely.
Now if they could only fix the problem of getting Siri to work again it would be great.

[hmr]

100kmh with pugs in have they fixed that

[stringsbytoby]

Did you use the clamp or stick on for your sena unit and the C3 Pro?

[HazzaBaniMalek]

does the sena unit interfere with the helmet's aerodynamics? any drag? buffeting? wind noise with and without the unit?