.

[Robert Gift]

...

Also it will reflect sound waves back and cause minuscule cancellation.

The screen bracket will reflect sound waves back? :?

Any obstruction in the projector sound path will cause standing waves which can cause some cancellation.
Always seeking the ideal, I'd remove that bracket if not being used for anything.

[SirenMadness]

There is cancellation, but it is so small that it does not make a difference to the people who hear it. You could put an ordinary stereo-speaker in the throat of the Thunderbolt, and no difference will be detected by one's ear. When the choice comes between keeping pests out of a siren or just harnessing that last fraction of a sound watt, I'd pick the first.

[Robert Gift]

Yes, but the screen is gone.
The bracket remains and provides a footing for a nest.

I'd try to squeeze out every mili-dB I could.

After finishing a bottle of juice, I pour in water, shake and rinse the entire interior, then drink it.
Did the same with our empty 1.5L bottle of Bailey's Irish Cream. Was delicious!

[SirenMadness]

Did the same with our empty 1.5L bottle of Bailey's Irish Cream. Was delicious!

Eww!

[NeoThunderBolt85]

I've seen you on YouTube before...bookmarked a ton of your videos. Nice clip of that 1003. It was interesting to see one mounted on a steel pole.

[red04stanggt]

Wow...just wow. That thing sounds AMAZING. Congrats on getting that thing running again!