Yeah 100%, with no bass traps it would sound bloody awful in this room and Arc would have to work so much harder.
I'm sure Arc is not 100% fix all for sure.... but at the moment after getting my ears used to it on all the time when I turn it off I can truly hear how bad my room was even with all the bass traps.
As Ethan pointed out a small room like the one I have will have a lot more problems than a bigger room. If you look at the correction pic you will see just how bad my nulls are. With Arc on I can hear each and every bass note at the correct level. And also never realized how much louder the left speaker was than the right.
Sure it sounds very weird at first, it even sounds wrong... you think you've just wasted all that money. Then you leave it on and get used to the sound, play a few commercial well mixed cd's. Then turn Arc off..... and it hits you. You have been LIED to by your room.
It's lied through all those hard decisions about bass volume, eq and all those other hard judgment calls you've had to make agaonizing over 1db of 12khz boost on the hi hats. It was all WRONG!
I have this track where when Arc is off you hear the first bass line, then when it changes note it nearly dissapears all together. Then on the other key changes they all sound like the same note. Turn Arc on and the bass is a lot quieter but you can hear every note.
I'm sold! This is up there with my Eventide H80000FW and Ubk Fatso purchases on the contribution to studio sound.
VERY IMPORTANT!!!! Make sure you turn off the time align speaker trim in preferences. It's on by default and is for speakers that are not in a symetrical position. Turn it off as it seriously phases your audio.