Antelope Eclipse 384 AD/DAC and preamp

Have anybody experiences with this phenomenal unit as converter or processor or just as preamp?
Antelope audio does not recommend to use Eclipse384 with preamplifier, because it will affect the signal/noise
But it is itself a preamp. Maybe with not many analogue inputs, but a genuine analogue/digital "central point" of a system, even of a nice highend home system.
Or in´t it?
Can nobody report anything about it?
I can't.Maybe some research can .Best of luck,Bob