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The first picture is my soundcard calibration with my mic cal (I think that is the to line)
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I don't really understand this statement, but the soundcard cal in the first graph looks perfect except for the squiggly line I've highlighted. I have no idea what that is. Hopefully you saved the soundcard file.
strangeline.jpg
You show 5 graphs. The first is the soundcard response. I take it the second graph is with the soundcard loopback in place and you're checking for a flat response to verify the soundcard calibration went correct.
You've lost me on the next two graphs that you call left and right channel? It is the sub you're measuring?
I do remember you had a stereo 2500 power amp driving your 4 IB's. You split the signal from the BFD and fed both channels. If that's the case then the sub out of your receiver is a mono signal that you check as one channel. All 4 IB's will play in concert.
Select the SUB tab and do the response - no LEFT and RIGHT.
Remember to reset your GRAPH AXIS LIMITS each time you measure to return to the default settings. The axis is incorrect on your left and right graphs.
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Everytime I applied the Impulse Response Control and set the pre ref to 125, my graph turned into a bunch of very close vertical lines.
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Yes, but that's the Impulse graph - you now need to return to your response graph. Select View and return to Filtered Adjustment screen where your graph is shown..
You don't need to provide the Impulse response graph. Once you take a measurement simply set the window to 125ms and return to your graph and that's it.
brucek