Cyber Acoustics CA-3001 Amplified Speaker System - 2.1-channel - Black - OEM
Package Contents: 3 Piece Sub Woofer Speaker System 9 volt power adapter 2 x Right/left channel speaker - cable 1 x Subwoofer - cable .
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As low as $24.89
User Review: I use them in my college dorm, and you can hear the sub from down the hall and on the floors below before it starts to distort.