Try that and just adjust the gain and see what it does.
It makes the soundstage wider, not deeper/3D though, but it also makes things sound more harsh.
I am sure the THX AAA will beat the living #$%^ out of whatever you tend to promote power-wise.....I LIKE IT though...have not heard FiiO X7 II so can not give my 2c about the comparison, I am still old school AK120 when it comes to non-streaming portable and then I have LX8, Mojo and CH2 doing heavy-duty which is not a fair nor accurate comparison......but what I would like to know is how it sounds against similar sound thieves...?
I'm going to compare and report back.
EDIT: First impression, Rihanna - Don't stop the music MQA.
X7II THX (balanced) - Clearly more sub bass power. Voice sounds fuller/more natural, at the same time slightly more harsh/digital/sibilant. Better instrument separation towards the edges of the stereo image.Bass makes the mix a bit muddy.
Ztella - Sharper attack, smoother sound, sub bass lacks some power, thinner sounding voice. Instruments at the stereo extremes drown a bit.
EDIT2: Soul Bossa Nova - Quincy Jones MQA
The X7 is much more natural sounding, like actually being there. Also more transparent, reverb sounds better, instruments are separated very well, sound is warmer and fuller. The Ztella sprinkles detail around nicely, but it still is like listening to a track instead of being there.
EDIT3: Man, I wish the X7 could do the second stage MQA decoding, I'd love to hear that.
EDIT4: It seems the FiiO M11 Pro can do full MQA decoding. It also has the THX amplifier.