Amazon.com: 12' Car Audio Speaker Subwoofer - 1600 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 40 Ohm, 60 oz Magnet, 2 Inch
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Amazon.com: Harmony HA-P15LS16 Replacement 15" Sub Pro PA 1000W Subwoofer/Speaker 16 Ohm Woofer - 90oz Magnet : Musical Instruments
Amazon.com: 12' Car Audio Speaker Subwoofer - 1600 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 40 Ohm, 60 oz Magnet, 2 Inch