I have a mbox (the original) and when i arm the tracks to record I have to turn the fader/volume all the way down or else there is a very bad echo that happens. But it doesn't record that way but it's hard recording vocals hearing an echo. Just wondering if anyone knows why this is happening. Also my friend has an mbox 2 and he has to do the same thing. But on the 002r that I use at my studio I do not have to do that, Is it the difference between the usb devices and the firewire?