ANC and Subwoofer Issue

[DGeis]

I had a local shop install an additional subwoofer and now the Active Noise Cancellation (ANC) has become audible. It sounds like a bad signal, buzz that goes in and out without any pattern. The shop's solution is to disable ANC by disconnecting the microphones, which can always be reversed later.

I don't like this idea because I don't care about the sub enough to disable a valuable feature. I'd like to be able to put it in or out, say on a family vacation, and have the ANC providing a quieter ride.

Is there any other subwoofer signal that is clean and could be tapped?

Alternatively, does anyone know if there is a Forscan code to disable ANC? This would be less intrusive and allow me to turn back on easily.

I couldn't find anything on here or Google for either question, so thanks for your help!

Dan

2018 Expedition Platinum

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[edizzle]

they effed something up!! adding a sub should have 0 effect on ANC

 

[DGeis]

It makes sense that it would be the ANC. It is amplifying a sound far beyond how it is tuned to operate. I read about other cars with ANC having the same issue.

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[Scottorama]

they effed something up!! adding a sub should have 0 effect on ANC

The ANC is expecting the subwoofer to be in a specific location in the vehicle in order to use it to cancel out the offending noises. If you put the subwoofer in a different location, it will definitely screw up the noise cancellation.

With most vehicles, you have to turn off ANC (usually by unhooking the microphones or cutting wires) when you do any stereo upgrades.

 

[edizzle]

i didnt think it used the audio system for ANC, i thought it had dedicated speakers for that, but i have no idea.

 

[DGeis]

Seems like something Forscan would be able to easily disable, just like the engine noise. Still hoping for a better alternative than physically disconnecting the system.

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[Trainmaster]

You sure the new sub signal wires are shielded?

 

[Scottorama]

i didnt think it used the audio system for ANC, i thought it had dedicated speakers for that, but i have no idea.

ANC uses the subwoofer

 

[DGeis]

I finally got some time to get Forscan installed and get familiar with using it. What a great tool!

I made some modifications unrelated to my subwoofer issue successfully.

However, I made one code revision that I found for the engine noise enhancement. It did not solve my problem.

How might I further research the modules and codes to search for disabling ANC? My current method (Google) seems to have tapped out.

Thanks
Dan

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[TBaganATX]

I had a local shop install an additional subwoofer and now the Active Noise Cancellation (ANC) has become audible. It sounds like a bad signal, buzz that goes in and out without any pattern. The shop's solution is to disable ANC by disconnecting the microphones, which can always be reversed later.

I don't like this idea because I don't care about the sub enough to disable a valuable feature. I'd like to be able to put it in or out, say on a family vacation, and have the ANC providing a quieter ride.

Is there any other subwoofer signal that is clean and could be tapped?

Alternatively, does anyone know if there is a Forscan code to disable ANC? This would be less intrusive and allow me to turn back on easily.

I couldn't find anything on here or Google for either question, so thanks for your help!

Dan

2018 Expedition Platinum

Sent from my Pixel 3 XL using Tapatalk

Where do they install the sub at? I have an XLT and will be upgrading my audio and I will be adding a sub. Just curious where they put it.

Thanks.
Tony


Sent from my iPhone using Tapatalk

 

[Aspen03]

It is common practice to disable ANC on vehicles so equipped when installing an aftermarket sub. Whether that is by disabling the mics themselves or unplugging a module, the result is the same.

Typically the modules are located in the dash. The F150 is, havent had to work on a 4th gen expy yet. Honda also relies on the dash for most of their vehicles as well. Unplugging is the easiest, mics are usually in the headliner and can be tricky to access and doing it repeatedly is just asking for trouble. Getting to the modules aren't usually very easy unless you have the flexibility of a rattle snake. I spent a good 10 minutes bending my wrist and hand in ways I regretted later while disconnecting one in a 2018 CRV last year.

It's something that should always be discussed as a lost feature when doing a sub install on modern vehicles as ANC is becoming more mainstream. It's in most of the Fords w Sony. I've ran across several fusions over the years. Some people didnt even know what they had.

System speakers are used for the ANC effect, they're already arranged to attempt to envelop you in sound so it only makes sense to utilize them.