Thunderbolt 1000T Siren Test 7-20-2011

Monthly test of my single phase Thunderbolt 1000T on July 20, 2011. Look closely and you can see the red light flashing during the signal cycles. Yes, it was deafening. This video provides NO justice on how freakin&loud it was in person. Stuff in the shop rattled around and even the ground felt like it was shaking when the horn was pointed towards me. It&amazing at what sound pressure can do..