I went back to Madison county today to film a 2906 before they're gone. I have no clue when that actually is, so I just filmed the 2904 and 2906 in two months back to back.
This is also the 2nd time I saw a T-128 installed next to a current siren. However, I passed by this siren many times, and it looks like the T-128 was only installed in the last month or two. The sirens did not test at the same time, and I doubt they ever will.
Anyway, there's the video:
https://www.youtube.com/watch?v=LyXdifjXpWg