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Old 06-21-2016, 09:59 AM   #2
Join Date: May 2015
Location: Stockholm, Sweden
Posts: 80
Well, it is what you say. A speaker box.

Improves the sound drastically when the air behind the driver is controlled/confined to a certain volume.

Compare with regular speakers for an indoor stereo that don't only have the drivers hanging lose in the air.
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