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Rotary Subwoofer

According to the AVS thread about it its been out for like 5 years
and some people are DIYing them down to 5Hz 😱
 
Yeah, these have been around for a while. You really need to right space for them, as they are a lot like an infinite baffle subwoofer (i.e. they need to be in a separate space with a battle to the listening room, and the second room needs to be tuned and/or sized appropriately)
 
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