Yamaha DTXpress/DTXplorer/DTXtreme

Hi to all you DTXpress Master, I just purchase a new DTXpressIII and 
it will arrive today. I have read alot on the subject and the major 
probleme I have spot is the headphone volume probleme. Since I will 
use only a headphone for now I'm a little scare of the result.Can you 
give me any new information on that matter.

Thanks 

hope my english is not to bad.