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I tried a budget projector with an external subwoofer, and this should be an option for all ultra-short-throw beamers

The Yaber K3 Pro brings the bass in a way that really stands out.

https://www.techradar.com/televisions/projectors/i-tried-a-budget-projector-with-an-external-subwoofer-and-this-should-be-an-option-for-all-ultra-short-throw-beamers