Low volume when play?

[logictree]

When I record my guitar through Jamup->Audiobus->Multitrack DAW, I experience a problem:
Playback volume is little lower than monitor volume.
I installed and reinstalled the app, but the problem is still there.
What did I miss?

BTW, my device: iPad 4th+Apogee Jam

[pwnified]

Hmm, interesting. How much higher do you need to turn up the OUT fader, to get it to unity gain?

[logictree]

Thanks for the reply. I have to turn up about 6db to get right volume.
Am I the only one who experiences this?