Goldwood Poly Cone 6.5 in. Woofer 170-Watt 8 ohm Replacement Speaker GW-S650/8 - The Home Depot
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Amazon.com: Visaton R10S 4" Full Range Speaker 8 Ohm : Electronics
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Pyle 5'' 200w 8 Ohms Mid Bass Mid Range Car Speaker Woofer Driver W/ 450hz To 7khz Frequency Response, 92db Sensitivity, & Magnet Structure, (2 Pack) : Target