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Speaker interference with iPhone/ aux. cable #4593655
12/04/17 05:15 AM
12/04/17 05:15 AM
Joined: Sep 2013
Posts: 10,692
Indiana
dlundblad Offline OP
dlundblad  Offline OP
Joined: Sep 2013
Posts: 10,692
Indiana
I bought a cheap $40 radio for my truck since the factory radio was on it's last leg. No iPhone control. Just a auxiliary and USB port.

For whatever reason, whenever I use the 3.5mm to 3.5mm adapter, I always get some sort of static/ clicky interference in the speakers. I imagine it's my phone emitting some sort of signal. I've used different cables with the same results. Makes listening to it pointless most of the time so honestly I've given up for now. FWIW, it works fine in say a 2016 model vehicle with an auxiliary port built into the factory system.

What could be causing this? I am not too "car audio" savvy. I have a nice Kenwood in my Jeep that was a (at it's time: 2010) flagship model with iPhone controls. No issues whatsoever even with my newer iPhone 6S.


03 Jeep WJ 4.0 202k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: Speaker interference with iPhone/ aux. cable [Re: dlundblad] #4593659
12/04/17 05:28 AM
12/04/17 05:28 AM
Joined: Dec 2011
Posts: 5,122
North Carolina
rooflessVW Online content
rooflessVW  Online Content
Joined: Dec 2011
Posts: 5,122
North Carolina


"Zed's dead baby, Zed's dead."
Re: Speaker interference with iPhone/ aux. cable [Re: dlundblad] #4593700
12/04/17 06:50 AM
12/04/17 06:50 AM
Joined: Jul 2009
Posts: 750
texas
danez_yoda Offline
danez_yoda  Offline
Joined: Jul 2009
Posts: 750
texas
Unplug the phone from the charger, that should get rid of the ground loop.

If not that cheap radio may have a faulty aux jack. I have repaired a few with broken solder joints to tye pc board. Have you trsted it with a walkman or other? And wiggled the connection.

If not it might be phone radio interference getting into the audio front end and overloading it. In that case you might get a ferrite ring core from radioshack and coil you cable through it few times to kill the high frequency fuzz.

Most audio inputs have input. Filter capacitors on them for this. At $40 pricepoint they might not bother.

Re: Speaker interference with iPhone/ aux. cable [Re: dlundblad] #4593780
12/04/17 09:20 AM
12/04/17 09:20 AM
Joined: Dec 2002
Posts: 42,303
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,303
New Jersey
Get a Bluetooth to aux in adapter.

You may lose a bit of sound quality, but you won't necessarily notice it. Very convenient.

Re: Speaker interference with iPhone/ aux. cable [Re: dlundblad] #4594123
12/04/17 03:18 PM
12/04/17 03:18 PM
Joined: Sep 2013
Posts: 10,692
Indiana
dlundblad Offline OP
dlundblad  Offline OP
Joined: Sep 2013
Posts: 10,692
Indiana
Should have mentioned the noise happens without being plugged in the charger.


03 Jeep WJ 4.0 202k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: Speaker interference with iPhone/ aux. cable [Re: dlundblad] #4594960
12/05/17 12:51 PM
12/05/17 12:51 PM
Joined: Jun 2003
Posts: 10,542
Illinois
javacontour Offline
javacontour  Offline
Joined: Jun 2003
Posts: 10,542
Illinois
Is the charger still plugged in? Some of them are quite noisy electrically. Get rid of all the chargers and see if the noise continues.


network down, IP packets delivered via UPS -BOFH
Re: Speaker interference with iPhone/ aux. cable [Re: dlundblad] #4594989
12/05/17 01:15 PM
12/05/17 01:15 PM
Joined: Aug 2008
Posts: 21,323
ON, Canada eh?
StevieC Offline
StevieC  Offline
Joined: Aug 2008
Posts: 21,323
ON, Canada eh?
Make sure the cable doesn't run anywhere near the back or front of the phone. It's most likely the phones transceiver that is creating the noise.

Does it sound like this?



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