I know the original post was about the 0.5ms blip. It will be good to see if it was the mic clip.
However, after your subsequent posts, I'm much more interested in finding out what is causing the strange impedance curve. I have left two out of six mounting screws off a midrange before and saw the leaky box show up in the impedance but it was nothing as severe as you show.
However, after your subsequent posts, I'm much more interested in finding out what is causing the strange impedance curve. I have left two out of six mounting screws off a midrange before and saw the leaky box show up in the impedance but it was nothing as severe as you show.
For the reflecting surface at 3.4ms, there is something about 1.7 feet from both the speaker & the mike.
For the reflection at 0.5ms, it will be something that is between 6" to 3" from the speaker or 6" to 3" from the mike.
You guys were correct there is something wrong in my wiring of the grounds because I had the + connected to the speaker and the - to a black wire in my crossover. (+ on speaker was not connected to XO). Still troubleshooting but it is not the mid.
Ok so I think I found the culprit to the reflection as being the floor. I put a poofy pillow on the floor and the "bump changed in size and timing". Also I have been playing with driver polarity and here is a system impulse. looks cleaner, however how do i tell which driver is which? I suspect the tweeter first, then the woofer then mid? do I want to change any polarity of any drivers?
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You can turn the speaker horizontal, and that will allow a longer gate, if you can, get it 4' from the floor. Don't drop it on your feet.
I look at the speaker phase, but don't really know what I'm looking at. As long as it doesn't wrap many times, I figure things are OK.
What order filter are you using on the tweeter and mid? Since the tweeter is ahead physically I would think maybe 4th order electrical on the tweeter, and second on the mid. That's just speculation though.
As usual ..
The blip timing only tells us how late the late wave was (or equivalently the extra path length taken), not necessarily where the reflecting surface is located.
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OK so Im going on Vacay for a few days and my game plan when I get back is to measure my system frequency response along with each driver superimposed on the same graph to see actuals instead of sims. Im hoping this will guide me to a better XO design. Maybe start a new thread since this has run its course. TY to all of you for sticking with me. I know how difficult it can be sometimes for an experienced person to guide a grasshopper like me 
. I just want to say it is very much appreciated. 🙂
. I just want to say it is very much appreciated. 🙂Strictly speaking, your reflecting surface is on an Ellipsoid with the mike and the source at the two foci. See pin & string construction on Wikipedia
Completely right. And still I suspect the clip, having seen it on the pictures. Been there done that.