Item Type: SpeakersModel Name: DDT-F25BImpedance: 4ohmsSignal To Noise Ratio: 0.1Car Maker: Acura、Aston Martin、Audi、Bentley、BMW、Bugatti、Buick、Cadillac、Chevrolet、Chrysler、citroen、Daewoo、Dodge、Ferrari、Ford、GMC、Honda、Hummer、Hyu