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Help! Anthem STR preamp ARC sounds bad now compared to off

Last time I used ARC, it made an appreciable positive difference.  Smooth, clean, and bass was deep.

I redid it yesterday, using 10 positions, and two subs, and it sounds much better, not louder, better with it off.  ARC is cancelling out all my bass.  It inverted the subs polarity, when i switch it to normal, bass comes back and is powerful.

I wonder if using 10 positions did something strange. 

Note, I also used the phase testing portion of ARC too to ensure speakers and subs are in phase. 

Did I do something wrong? How could it mess up this bad when it seems to have done so good on my first try a few weeks ago?

Anyone wrestled around with best practices here?
dtximages
mike_in_nc
1,139 posts
 
Hard to say, but if you post your PDF file, I’ll take a look. I have an STR preamp, also.

Are you aware, the phase adjustment
  1. should be made with the mic at the main listening position,
  2. should be made AFTER you have uploaded the corrections,
  3. and AFTER you have set speaker distances, and
  4. will be programmed ONLY into Profile 1 of the preamp?
You will need to copy the phase settings from Profile 1 to the other profiles, if you use them.

I have never used more than 7 positions for measuring, so if there is a bug with 10, I wouldn’t have experienced it.

Hope that helps.
dtximages OP
364 posts
 
Wait what?  It only applies to Profile 1?  Well that changes things.

I actually think 10 locations might have been the problem too.  The first time I ran ARC, I used 5 locations, but never moved the mic from the first position. 
jjss49's avatar
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jjss49
6,612 posts
 
arc?  huh?
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