Despite one being for PC and one for Home Theatre the Companion 5 and Gemstone series II have nearly identical dimensions. : r/bose
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Bose Companion 5 Sound Test - YouTube
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Bose Companion 5 Series II ~ Subwoofer ONLY for Multimedia Speaker Acoustimass | eBay
Bose Companion 5 Series II ~ Subwoofer ONLY for Multimedia Speaker Acoustimass | eBay