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<blockquote data-quote="Rad10eng" data-source="post: 24344" data-attributes="member: 8989"><p>The 2025 Equinox comes with a noise cancellation system. It uses the rear speakers to inject an inverted sound to the noise being produced inside of the car, which much of the time cancels it. It appears that there is a flaw in the algorithm of the Digital Signal Processor that causes the phase to shift when the engine is between 1800-2000 RPM, thus increasing the noise at those frequencies. If your engine is in that &quot;sweet spot&quot;, and you hear a loud rumbling. Reach behind your seat and place your hand over the rear speaker. You will feel the source of that noise. Per my service rep at the dealership. &quot;GM is aware of the issue, and they working to find a solution&quot; He did not give me any timeline, but said the I would be contacted when a fix was available. Oh, almost forgot. There is a microphone that takes noise samples so the system can work. My dealership told me that it can be turned off, but there is no control I can access to do so. This would require a trip the the dealer.</p></blockquote><p></p>

[QUOTE="Rad10eng, post: 24344, member: 8989"] The 2025 Equinox comes with a noise cancellation system. It uses the rear speakers to inject an inverted sound to the noise being produced inside of the car, which much of the time cancels it. It appears that there is a flaw in the algorithm of the Digital Signal Processor that causes the phase to shift when the engine is between 1800-2000 RPM, thus increasing the noise at those frequencies. If your engine is in that "sweet spot", and you hear a loud rumbling. Reach behind your seat and place your hand over the rear speaker. You will feel the source of that noise. Per my service rep at the dealership. "GM is aware of the issue, and they working to find a solution" He did not give me any timeline, but said the I would be contacted when a fix was available. Oh, almost forgot. There is a microphone that takes noise samples so the system can work. My dealership told me that it can be turned off, but there is no control I can access to do so. This would require a trip the the dealer. [/QUOTE]

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