Boost Volume in Schuberth C5

[siddo]

Is there any way to do this.
It's too quiet at anything above 60 mph. I do have everything already turned up full, before someone suggests checking.

 

[LockieP]

By everything turned up I assume you’ve done this in the app & your phone volume is max.
I found that padding out the speakers on my C5 to bring them closer to my ears worked. I used pipe lagging foam & double sided Gorilla tape.
Somewhere on iPhones there is a setting asks if you’re outputting sound to earphones or other devices like a Bluetooth speaker or car stereo. I can’t seem to find it but I remember setting mine to car stereo meant that the headphone warning stopped coming up for overexposure to loud sounds.