Hm? Why have you problems to understand him? In fact, I can't understand properly each members ('cause I'm young and english isn't my first langage and I'm not so gifted for it) but I don't see why he's more difficult to understand to the others... ?
That's it. The girl speaks loud, clear and fluent wheres Roope used his typical... well, he has his own language. But the main reason is hejust speaks tooo quiet
Roope would suck as a telemarketer... but if he was selling something really expensive to companies, like "dangerous investments", he could actually sound convincing.