Well, here's the result, just about what I had thought it was. Absolutely no testing, no preparation, hell I wasn't even completely sure where and how to put the sensor on the windshield. I stuck it up on the passenger side of the windshield just a few inches from the A pillar and a few inches from the top and went at it with music only (Thanks to Chop for pointing out where to find some different stuff to download) and the truck all sealed up. The wild thing that you can't see in the picture (the device can probably show it, dunno) is that it was pretty damn flat across the board with the real time level and frequency showing me I was still hitting 129.9 at 28hz and I saw 129.5 at 36hz too. Can't wait for my Omni mic to get here so I can see what the frequency response looks like overall. This is going to be a fun little toy.