hey all, I have a couple of questions regarding the 400+ that i just got: 1. i've read some old threads saying that flat is 0-10-0. I tried this, but it seems like the bass is way rolled off compared to my other amps. 4-5-5 sounds about flat to me... was it ever determined if the 0-10-0 is correct? 2. My channel #1 has significantly less gain that channel #2 ie channel 2 at 6 is about the same as channel 1 at 10. is this normal? 3. Does anyone know the actual difference between #1 & #2 channels? channel 2 seems to have more bass & less treble, but what are the actual reall differences? 4. how do I tell if a tube is bad? despite what i've read here, the 400+ doesn't seem to be overwhelingly loud compared to a few of my other amps. i'm thinking it's possible i have a bad tube or 2.... thanks !!