after invesgating LX85's users manual, I found at least two features that LX85 dosen't have.
1. No Overlaid OSD
no volumne nor input audio format displayed when changed. many other AMPs have this feature,even if some entry types. such as Denon AVR-1612/1912/2310 and above.
2. LFP crossover freq. is not indivadual to each channle. instead LXs use only one freq. for all channles.