[ranas]

yes, For me the output levels seems to be lower, but i dont have any measure tool. what can i tell you is that i have m-audio reference monitors, and I also have a m-audio 2496 audiophile. after buying mbox 2 pro I noticed an important change of output monitoring levels. To deal with this diference, I had to put monitoring level fader in mbox to 85% (0db in pro tools output) and maudio monitors level fader to 75% (normally I used 65 to 70% with audiophile).
I also dont know why ¿?
hope it helps
regards