1, About the position of the power indicator!
Depend on our experience! the blue light may hurt your eye ( or make you uncomfortable)! so I asked our engineer to put on somewhere which is not so noticeable !
2, About the power switch!
I know it will be better to control E7's power from E9! so you don't need to operate twice! but it is a little complex because we need to install a MCU into E9! also
when you dock the E7 on E9, the E7 will powered by the E9 so the build in battery will not work! I think you can let the E7 power on!
3, About the different in SQ between E7 & E9, I guess it will be better to use a big cans! also , we are quite happy because the great amp should be just amp the power
and keep the same sound from the original! of course, it is another topic if you are talking about tube amp!
Anyway, it is a great review