If a car subwoofer is blown, there may be scratching noises, but a subwoofer that won't push down has definitely gone bad. Find out how to use a digital voltmeter to test the positive and negative terminals of a subwoofer with help from the manager of a car audio store in this free video on car audio and subwoofers.
Expert: Rich Richards
Bio: Rich has over 20 years of experience in home audio and car audio. He is the manager at Innovative Home and Car Audio.
Filmmaker: Michael Burton
Негізгі бет Car Audio : How to Tell if a Car Subwoofer Is Blown
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