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Discussion Starter #1
Hi all,

I recently had a Pioneer TS-WX300A subwoofer installed. It works fine however it comes in strong when I rev between 1,500 to 1,700 and at 2,000 rpm. This happens even when radio,stereo off. I have taken in back to the guy and he cannot figure out what is causing it! This doesn’t happen when the door is open. Last time I took it round he isolated it so it only picks up the signal from aux when I plug my phone and it has stopped doing it.

Has anyone come across anything similar? I would like this rectified as it is annoying have wires running on the side of the seat and not being able to hear the sub through the radio or cd.

Any feedback welcome
.

Thanks
 

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What exactly do you mean bu "Comes in strong"? As you say it happens with the radio Off.
Where is the sub fitted?
 

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Discussion Starter #3
It kicks in depending the revs , like a strong boom and the goes away after the revs increase . If I am driving at a steady 1,600 rpm the bass is a loud constant thump.It is fitted in the boot


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It's always difficult to try and diagnose an issue when third party equipment has been wired in.

Hope you find a solution.
 

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Discussion Starter #6
I had a look at the I-mid menu, didn’t find anything relevant with speed increase. Only the speed alarm option


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IT should be in the menu along with BASS / TRE etc - Labelled SVC. That can be turned right down; The fact that the sound is coming through between an RPM range whilst the stereo is off makes it sound more like an engine / frame vibration; Possibly vibrating the sub?
Depending on how is it mounted, can you take it out of the boot to ensure it's not a vibration from elsewhere - You could even try remounting it with some shock isolation / damping mats.
 

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Discussion Starter #8
I turned the Audio SVC off, however I don’t know if that makes any difference at this moment, because the guy has rewired the sub to pick the signal just from my phone. As for the mounting I don’t think it’s that as now it works without the issue... I just can’t hear it through cd/radio only phone


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Discussion Starter #9
Just to update, the issue is still ongoing however you only notice it in low volume.. So having Audio SVC turned off doesn’t do the trick. I don’t know what to do.


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Discussion Starter #11
I assume so , the guy checked it twice.. I’m taking it back next Saturday. He was saying something about a feature that is probably causing this , something about a low frequency white noise that comes on when you drive in motorway, to cancel outside noise? But it has to be interference from somewhere


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Ah, yes, that's probably it.
The 1.6 has active noise cancellation, that could well be why. There are microphones in the mirror pod for this, perhaps see if a passenger holding a pillow or similar to the roof light /mirror area has any impact on the sound output, barring that, you could have a look in the debug menu of the connect unit to see if anc can be disabled.

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That sounds a bit suspect to me. Do Honda cars have active noise cancellation? If they do, it's not white noise but internal road noise in the opposite polarity to cancel it.
 

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That sounds a bit suspect to me. Do Honda cars have active noise cancellation? If they do, it's not white noise but internal road noise in the opposite polarity to cancel it.
They do on the 1.6 diesel 9g at least - not a very publicised feature, but you'll find it if you search.
The microphone comment is based on the component locating index from Marks, may be on the share if I pulled it.

It is low frequency since that is played, so it would translate to an indistinct rumble from the sub.
Perhaps an inline filter of some ilk that could squelch the output? That would allow you to retain noise cancellation, but I don't think such a thing exists.

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Discussion Starter #17
Found the debug menu but no joy. Did some googling and found a Gideon of a guy having the same issue and it is because of these two mics which are for the Active Noise Cancellation


We will disconnect these on Saturday and rewire the sub and fingers crossed it will be sorted


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Out of intrest, ( ;) ) how was the fitting? I imagine this is on the stock headunit? do you have an alpine or the connect unit? I wouldn't mind doing something similar :d
 

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Discussion Starter #20
It’s the stock head unit.. he did have a hard time in the beginning as the wire colours were different from any diagram found online. Anyway just came back and all sorted! He just unplugged the two mics as per photos and all is working fine


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