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Discussion Starter #1
Hey guys I’m glad that I joined this club to get help and ideas. Last year I bought 2018 Honda Accord EX in February. So far this is my first car and I love it, I trust Honda brand because their product last long without giving major maintenance.
Recently I replaced the door and trunk speakers with infinity reference speakers. The sound is much better and clear than the OEM speakers. I was missing sub so I installed Rockville 10” compact powered subwoofer in trunk and used high input from trunk speakers. Here’s the problem started, whenever I drive my car and hit gas paddle there’s buzz noise coming from subwoofer around 2000rpm, there’s no buzz noise when engine is idle while car is in parking mode. Whenever I hit gas paddle with or without driving that buzz noise occurs. So I went to car audio shop and there the technician disconnect the ANC module which prevent outside noise in cabin while we drive. I driven my car for two days and paid 80$ for just unplug ANC which is situated behind the glove box. There was no buzz noise at all but I was facing too much outside noise when I was driving, I went back and told them to plug that anc module back. I watched so many videos on YouTube, googled to try to get rid of this buzz noise.
ANC is active noise canceling which control outside traffic noise and make cabin room quieter. Subwoofer positive and negative cables are installed correctly. Is there any solution for it to get rid of that buzz noise without disconnecting the ANC module? Is there any noise filter or DC current filter needs to be install ?
Please help

dharak
 

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Discussion Starter #3
Do you have a device like "audio control lc2i" that restores the bass frequencies?
Do you have a device like "audio control lc2i" that restores the bass frequencies?
Yes I just bought and installed it and it works great, I did disconnect the ANC harness because the two mics catches low frequencies with or without turning on the factory radio. That’s sad for me because I wanted subwoofer without disconnecting ANC.
 

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My suggestion was, try neutralizing the “bass restoration” and see if that allows you retain the ANC functionality.

in other words use LC2i just as a LOC than plugin the ANC again.
 

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Discussion Starter #7
Yes sir,
Either way we have to disconnect the ANC if your going to install subwoofer. I’m trying to find out what else that ANC module for?. Because it harness have multiple wires and I don’t know what other function the ANC have except controlling low frequencies. If you know please share.

thank you
Dharak
 

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Here is a thought!

if you search in this forum you will find a post from someone explaining that you can setup a switch (on a green wire in the ANC plug).

So, if you make a bypass on that wire to a toggle switch and use it in the on position as a 12v remote wire to the sub amp and off position to turn on the ANC. You could effectively have ANC at lower volumes and the sub on at higher volumes at a flip of a switch. At higher volumes I don’t care that much about ANC as any noise is drown out by the music anyways.

just a though, as I had to pause my install as temperatures are below 32 degree in my area.
 

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Discussion Starter #9 (Edited)
Here is a thought!

if you search in this forum you will find a post from someone explaining that you can setup a switch (on a green wire in the ANC plug).

So, if you make a bypass on that wire to a toggle switch and use it in the on position as a 12v remote wire to the sub amp and off position to turn on the ANC. You could effectively have ANC at lower volumes and the sub on at higher volumes at a flip of a switch. At higher volumes I don’t care that much about ANC as any noise is drown out by the music anyways.

just a though, as I had to pause my install as temperatures are below 32 degree in my area.
Hi sir,
Thank you so much for replying, I bought that audio control LC2I from Crutchfield with technical support. Also I bought Rockville RW10CA which is low profile 10” powered subwoofer with 800watts & 200watts peak with 2ohms impedance.
Few days back I took short drive with ANC and without ANC while the subwoofer was completely turn off. I didn’t notice that much difference outside noise in the cabin. Also I used Bluetooth calls during this test and there was no difference, it was working perfect, so I disconnected the ANC. I used trunk speakers as a high input for subwoofer. For me LC2I worked great. I still have confusion to tune LC2I with subwoofer because the subwoofer have bass boost an gain, LC2I have accubass & bass level too.
I’m going to check rca output volts with multimeter to set proper gain and bass level.
Sir please explain in detail your last message about though of bypass switch so I can try one more time, I’m sure that except mics and active noise canceling, that ANC module have other functions too. I don’t know where to get that information in detail.
 

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unlike touring models you have an 8 speaker system, correct? That would mean your ANC is coming from rear speakers. So in theory once your sub is off you can have the ANC on.

I am also assuming you have the rear speakers connected.

Regarding bypass, look at the post #28 in the following conversation thread
the user claims he has done just that. Installed a on/off switch on that wire.

the green wire he is talking about is likely 12v (you should measure before anything else). So, a simple two way switch would allow you to take the 12v lead and send it either to ANC module or to the remote connection on the sub’s amp.
 

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Discussion Starter #11
hi sir,
thank you for replying, so I just followed the steps and turned off the PS settings, I don't know whats that setting stands for? if anyone have idea please share, also wants know to what it makes difference while the ANC is connected and PS settings turned off.
 

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Discussion Starter #12
hi sir,
thank you for replying, so I just followed the steps and turned off the PS settings, I don't know whats that setting stands for? if anyone have idea please share, also wants know to what it makes difference while the ANC is connected and PS settings turned off.
there must be a good solution for it because the buzz noise occurs if you turn on the radio or not, as soon as you turn on car and hit gas paddle the buzz noise occurs. if i disconnect the high input during that time than there will no buzz noise at all, i am still trying other methods/experiment not to disconnect anc while having sub turned on. the factory audio system does not have low level RCA input/output, all it carries only speaker output directly connected to speakers.
 
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