I feel like a punching bag!
;~}

DeeringAmps
I feel like a punching bag!
;~}

Hey, me too! But my wife keeps reminding me she has a license to push me around, signed by a duly-appointed justice of the peace in 1976.

bitflipper

DeeringAmps
You can "fix" the peaks that way, but the "nulls" will still be nulls.
My guess is that ARC does some phase shifting to "fix" the nulls.
It helps a lot in my room.
YMMV
T

A reasonable guess, Tom, based on the fact that IKM don't go out of their way to dispel that presumption. In fact, they're annoyingly vague about what ARC really does, preferring that you just chalk it up to magic.
 
 

A bit like this? 
 

No, that's entirely different. I've seen the documentary. One Ronald Weasley drove that exact same car into a tree.

Here is something I ran across recently - Mathaudio Room EQ VST.  It appears to work similar to ARC and they do make the similar claims, but they seem slightly less "obtuse" about it.  To the OP's top post, it's certainly cheaper to buy (no mic included in price), and you can download and try it for free!  Not shilling here, it's just been on my short-list of "wiry and speaker-y" things to do in the studio.  I already have an ECM-8000 (I know - a dubious honor) so I suppose I'm partway there.

Wow: Look at that resultant frequency response:
 

 
That white line is as straight, maybe straighter, than the competition's white line.

I get that same response, but it's about -80 db; when everything is off!
:€}

all that is doing, is subtracting everything out to a bottom line..
 
looks like you lost more than 80% of the original signal...
that CAN'T sound good!
 

Just once I'd like to see somebody publish before-and-after waterfall plots. It'll never happen, though.

There are some very happy real life experiences shared here:
 
http://mathaudio.com/testimonials.htm
 
This one is my favorite:
 
"A few days ago I came across your foobar Room EQ plugin. First a big THANK YOU for this wonderful plugin. I tried to EQ my speakers and quickly made 4 measurements (with a calibrated mic). The speakers are full rangers in a "test" card box setup, (my real speakers are on repair :-( ) which can not sound good in that "enclosure" and the frequency response is far from ideal. With your correction the sound improved very much. I then tried to EQ a portable speaker (Canton DSS 103). The results where stunning! I asked my two children (6 and 8) if they preferred the EQed sound and which version sounded more real. The answers were very clear that by far the EQed version was much better and "live" sounding. Of course I adjusted the loudness with pink noise for the corrected / uncorrected slider to match.
Peter"