drewfx1
What "phase issues" are you talking about?
 
And the way I like to think about this stuff is this:
 
The room is acting as a filter at the listening position, complete with frequency and phase changes and ringing. That's really exactly what's happening, with the speaker's response also factoring in. The trick is to create an inverse filter that doesn't make things worse when you move your listening position a little bit, and that's what ARC , EQ or any other form of digital room correction tries to do. And some things are easier to correct than others. 
 
Acoustic treatment and room design, OTOH, attempts to make the "room filter" less extreme.

  
"The phase issues" are an assumption on my part of anomalies in the sound that is just weird. I have seen various threads here and there regarding said 'phase issues' so I gravitated to that term as an explanation of the weirdness I hear when running ARC 1 or 2. 
 
I'm pretty sure there is no magic bullet here. My room is as corrected as it's going to get. Just trying to get some kind of usage from ARC2 before I shelve it (along with ARC1) and The $350 spent that got me there.
 
And yes, I use my ears from time to time.

drewfx1
What "phase issues" are you talking about?
 

 
THE phase issues that occur when equing heavily, which is what ARC does to "compensate" the room response.
 
 

drewfx1
And the way I like to think about this stuff is this:
 
The room is acting as a filter at the listening position, complete with frequency and phase changes and ringing. That's really exactly what's happening, with the speaker's response also factoring in. The trick is to create an inverse filter that doesn't make things worse when you move your listening position a little bit, and that's what ARC , EQ or any other form of digital room correction tries to do. And some things are easier to correct than others. 
 
Acoustic treatment and room design, OTOH, attempts to make the "room filter" less extreme.

Room treatment aims at balancing the room response by using absorbers tuned to proper frequencies in the right places i.e. it takes away energy at certain frequencies ... this is nothing like trying to create an inverse ...

Rob[atSound-Rehab]

drewfx1
What "phase issues" are you talking about?
 

 
THE phase issues that occur when equing heavily, which is what ARC does to "compensate" the room response.

 
The room response already consists of both frequency and phase response changes. It is impossible to have a change in frequency response without also changing the phase response, regardless of whether it's in a room, in analog electronics or in DSP. IOW, the room is EQing heavily and phase response is messed up by this. Again, the room is just acting as a filter at the listening position.
 

drewfx1
And the way I like to think about this stuff is this:
 
The room is acting as a filter at the listening position, complete with frequency and phase changes and ringing. That's really exactly what's happening, with the speaker's response also factoring in. The trick is to create an inverse filter that doesn't make things worse when you move your listening position a little bit, and that's what ARC , EQ or any other form of digital room correction tries to do. And some things are easier to correct than others. 
 
Acoustic treatment and room design, OTOH, attempts to make the "room filter" less extreme.

Room treatment aims at balancing the room response by using absorbers tuned to proper frequencies in the right places i.e. it takes away energy at certain frequencies ... this is nothing like trying to create an inverse ...

Right. I said room correction is making the "room filter" less extreme at the listening position. OTOH = "On The Other Hand".

Just an update.
I discovered the 
 “Combined L/R Correction” function  button.
Just listened briefly but it seems to have cleaned up things a lot as far as the phasing/stereo spread goes.
hurray..