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Ohm: 8 Power range: 15-25W Effective frequency: 81Hz-5400Hz Sensitivity: 87dB Note: Please check the speaker's size carefully in advance in order to making sure that you can install the speaker correctly! Package include: One pair of speaker - 3 inch compact size design subwoofer audio speaker - Sensitivity: 87dB; Effective frequency: 81Hz-5400Hz - Anti-magnetic design help to avoid magnetic-field interference - Size: outer diameter-89mm;install opening-71mm57mm height - 8 impedance; Power range: 15-25W; great subwoofer which can match with treble.Yeeco Pack of Two 3 inch 8 Ohm 25W Mini Car Audio Speakers Subwoofer Woofer Sub. The item "Yeeco Pack of Two 3 inch 8 Ohm 25W Mini Car Audio Speakers Subwoofer Woofer Sub" is in sale since Thursday, September 6, 2018. This item is in the category "Consumer Electronics\TV, Video & Home Audio\TV, Video & Audio Parts\Speaker Parts & Components\Other Speaker Parts & Comp. The seller is "esale*store" and is located in US. This item can be shipped worldwide.