New subwoofer is not working

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MacBook Pro 15" Unibody Early 2011

Model A1286. Released February 2011 / 2.0, 2.2, or 2.3 GHz Quad-core Intel Core i7 Processor

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Hello.

From IFIXIT, I bought and installed a right speaker/subwoofer in my Early 2011 15” MacBook Pro.

The speaker sounds fine, but the subwoofer isn’t working. Is there any way to test if it is functioning or not functioning?

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Dan @danj Rep: 479.7k Self employed contract worker 35 329 971 · Answer 1 · 2018-08-22T05:36:15-07:00

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Rep: 479.7k

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Does the speaker look damaged in any way? The membrane can sometimes be blown but too loud a signal.

If the speaker is not damaged the easiest way is to measure the resistance of the speaker unit comparing the value to a second working unit.

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