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Logitech Z506 Surround Sound 5.1 Home Theater PC Speaker System

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Logitech X-540 5.1 Surround Sound Computer Replacement Speakers ONLY NO SUB

Logitech X-530 5.1 Surround Sound Computer Speaker System Sub + 3 Wired Speakers

Logitech X-540 5.1 Speakers MAIN VOLUME CONTROL KNOB DIAL PANEL POD ONLY off Sub

Logitech Z-640 Dolby 5.1 Surround Sound System Speakers Subwoofer PC Video Game