They're probably the same as on my Mackie Onyx Satellite (same preamps after all), and those are good, but using my Redeye as a DI sounds subtly but noticeably better (more detailed and open)
Yeah, the 400F definitely has better converters, AFAIK they're the same as in the 1200F, which are supposed to be up there with RME! No ADAT inputs sucks, though... (10 simultaneous inputs is the max :Smug: )