Yes! LCDi4 need EQ correction that Cipher does.
If not the new Wireless Cipher, use the old fashioned Audeze Cipher cable with LCDi4.
Audeze claimed from get go that LCDi4 do not need EQ correction, the very thing Cipher DSP does.
That was true then, it is not true now. Isine and LCDi4 BOTH need the same EQ correction. Why Audeze claimed LCDi4 do need Cipher DSP is purely marketing, they didn't wish LCDi4 to have "idevice only" reputation.
Just listen to LCDi4 with Cipher, and then listen them connected with regular cable (no EQ applied on source device) and it's clear, without a doubt, LCDi4 need similar DSP correction curve.