Ok, I just picked this guy up from L&M on the weekend and I haven't had much time to play around with it yet (2 hours) but I've noticed something that kind of bugs me. I plugged in an SM57 to record acoustic guitar with, just as a quick little test. I also plugged in a direct line from my guitars active pickup. Both lines were into pre-amp channels 1 and 2 on the 400f respectively. On the front of the Onyx 400f there are LED indicators to show sound level. I need to crank up the gain on both of the chanels in order for the LEDs to even light up, if they are cranked and I have the vol on my guitar turned all the way up and I am within 4 inches from the mic, then I get a decent level (not clipping yet) on both channels. Any less and the level is too low for my liking. There doesn't seem to be a situation where I could even get an instrument to clip. The line from my guitar's pickup is going into the pre-amp on the 400f, if I plug it into the line in, I don't get a level reading at all on the front LEDs. I did not expect this to happen with this unit, it seems that I cannot really push the volume if I wanted too; I'm doing everything I can to get ENOUGH volume. I played around with the DSP mixer settings and everything is turned all the way up, no mutes or solo buttons or anything like that. I'm wondering if anyone else who has this unit has had this problem or might know anything about it. Any help at all would be appreciated. I'm using Windows based Cubase SX, but I don't suspect the DAW has anything to do with this.