x RELIC x
Headphoneus Supremus
It might be possible that the HA-1 is at fault!, does it show correctly with a diffent input?
When I connect my X5 to my E17 I have no problems with 24bit
From what I remember when I owned the e17 it always displayed the incoming source as 24bit. This is a known quirk (if I remember correctly).
The HA-1 is a very capable amp and it's coaxial, optical, and AES/EBU inputs can all accept 24bit PCM.
EDIT: Human error!