Audiophilepure

https://www.soundandvision.com/content/svs-sb-5000-subwoofer-review

‘Solid’ is another apt description. For a subwoofer that isn’t all that large, it weighs a surprising 102 pounds. The 15″ driver alone is almost half that weight, it’s a very beefy unit indeed. Some people gauge the structural integrity of a subwoofer enclosure using what’s known as the “knuckle rap test”. In essence, you tap your knuckles on any cabinet panel – often the top is chosen – and listen for a hollow sound. Because a sub is responsible for deep notes the tighter and more dense the structure, the less the panels will resonate and negatively color the sound. On the SB-5000 you get a dull thud no matter where you rap your knuckles, exactly what you want to have happen.

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