Hmm...reviewing their site, I may be wrong about it not being louder than O/A, but it has been 7 years since I used and All-States torch, and 2-3 since I used an O/A torch. However, it doesn't sound all that loud to me on their videos.
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If their videos seem to take a long time to load, I found the direct links to be a little faster. This is a product description:
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And this is cutting 16ga sheet:
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And cutting 5/16" angle iron:
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