1. Bill McNeal's Avatar
    Hello,
    Got my new iPhone on Thursday, upgrading from a 3g. The head unit in my car has an aux. input on the front and I've been listening to my 3g on it for the past 2 years with no issues at all aside from the normal GSM interference when not on 3g service.
    My 4 has a very noticeable hiss, whine, or buzz when I plug it in. It's very, VERY annoying, basically making in unlistenable. I've tried it with slacker, pandora, MLB at bat, Wunderradio and iPod and it is there just the same on all services.

    Is anyone else having this issue? or is something wrong with my phone?

    For the record, I've tried headphones, and they are fine. I had a ground loop isolator around and put that on the line and it filters out the whine, but the audio quality is not nearly as it good on my 3g.

    If anyone has any feedback it would be appreciated, even if it is just to say you are plugging it into your car stereo and you are not having the issue.

    Thanks!
    Last edited by Bill McNeal; 06-28-2010 at 09:35 AM.
    06-28-2010 09:32 AM
  2. Bill McNeal's Avatar
    Bump.
    If anyone has plugged their ip4 into a radio of anykinds using the headphone jack, did you have a fairly loud hiss or whine in the line?
    06-29-2010 06:16 PM
  3. WcHorse's Avatar
    Nope sounds fine to me!
    06-29-2010 06:19 PM
  4. big9erfan's Avatar
    Get an AUX cable with a ground loop in it. I got one off Amazon last year for use with my 3GS. Works flawlessly.
    06-29-2010 06:42 PM
  5. Bill McNeal's Avatar
    thanks. I have the ground loop cable already, I was just wondering if this was a an issue with my unit or if it was global. Looks like I'm headed for the genius bar.
    06-29-2010 06:43 PM
  6. big9erfan's Avatar
    Interesting...Maybe try the Genius bar....try it in another car first, then maybe try another cable too.

    I have this one: Griffin Noise Reducing Audio Cable for iPod iPhone MP3 - eBay (item 120522520718 end time Jul-23-10 22:28:20 PDT)
    06-29-2010 06:48 PM
  7. bergman's Avatar
    Is the interference coming through the cable or is it the phone sending data and hitting the radio/amp directly? I get the latter, but not an issue when listening to MP3's via AUX.
    06-30-2010 11:01 AM
  8. CJEscandell's Avatar
    Hello,
    Got my new iPhone on Thursday, upgrading from a 3g. The head unit in my car has an aux. input on the front and I've been listening to my 3g on it for the past 2 years with no issues at all aside from the normal GSM interference when not on 3g service.
    My 4 has a very noticeable hiss, whine, or buzz when I plug it in. It's very, VERY annoying, basically making in unlistenable. I've tried it with slacker, pandora, MLB at bat, Wunderradio and iPod and it is there just the same on all services.

    Is anyone else having this issue? or is something wrong with my phone?

    For the record, I've tried headphones, and they are fine. I had a ground loop isolator around and put that on the line and it filters out the whine, but the audio quality is not nearly as it good on my 3g.

    If anyone has any feedback it would be appreciated, even if it is just to say you are plugging it into your car stereo and you are not having the issue.

    Thanks!
    I'm not having interference when I connect my phone to my aux jack in my car, but ever since I switched to the iPhone 4, it just randomly stops playing every once in a while, so I have to go back and press play again. It never happened with my 3Gs.
    06-30-2010 02:57 PM
  9. easyrun99's Avatar
    I'm not having interference when I connect my phone to my aux jack in my car, but ever since I switched to the iPhone 4, it just randomly stops playing every once in a while, so I have to go back and press play again. It never happened with my 3Gs.
    That may be an iOS4 issue. My wife's iPod Touch always worked fine until I downloaded iOS4. It now randomly stops playing...
    06-30-2010 03:16 PM
  10. BreakingKayfabe's Avatar
    Do you use a charger at the same time? The other day I was getting all kinds of interference
    and very low volume on the music I was playing from my iPod. Turns out my car charger
    conveniently decided to take a dump. So since it was actually plugged in without actually
    working to its potential (the charger) it started causing that interference.

    I use a Belkin aux cable. Picked it up at Target for $14.99. Been using it since the
    beginning of this year.
    06-30-2010 03:42 PM
  11. Ned#IM's Avatar
    Bill McNeal, I am having the exact same problem with my Iphone 4. The main thing I have figured out is that it is at its worst when the phone is NOT set to MAX volume.

    I have a JVC head unit with an AUX in and a relatively cheap AUX cord. The problem occurs regardless of whether the phone is charging, in a case, or in airplane mode. It also happens on any song whether I am using Pandora or the Ipod program. I also experienced this problem with my previous AUX cord that I trashed because I thought it was causing the problem. I never had any problem with my older Ipod and this radio. Turning the phone off, by holding the power button and then sliding the icon to the right, and turning it back on does not help.

    The problem does not occur with headphones or on any other speakers that I have connected it to (which is not many). The problem did not occur at all when I plugged it into my friends car with a Kenwood head unit even though I used my AUX cord. In fact the audio was very clean.

    Strangely, when I plugged my friends Iphone 4 into my JVC head unit with my AUX cord the problem did not really occur, though it was not as clean as when mine was plugged into the Kenwood. There were minor high pitched wines and static interference especially when I changed the volume but it was not persistent like it is with my Iphone when the volume is below 100%.

    My conclusion is that the JVC unit is especially sensitive and that my Iphone may also be generating a bit more interference than others. I probably won't return because I can play the audio just fine in my car through the dock port, but I am curious if others are having this problem.
    07-06-2010 10:43 PM
  12. iVenom's Avatar
    i hear this on my i4 when on a call using the car speakers i think its the second mic or its picking up interference
    07-06-2010 10:50 PM
  13. ElecBlueFish's Avatar
    I can confirm what seems to be the same problem on my new iphone 4. Like you, I didn't have this problem with my 3G or 3GS

    My car doesn't have a factory aux port though. I added that myself with a Blitz Safe Aux Adapter from Enfig:

    enfigcarstereo.com/shopsite_sc/store/html/VW_AUX_DMX_V3.html

    This allows one to patch the iPhone headphone audio into the CD changer port of the car. But, now I have this dreaded hiss and interference that gets worse when I turn the volume down on iPhone.

    For what its worth, I have a Genius bar appointment today. I will let you all know what I find out..
    07-09-2010 05:04 PM
  14. TechJunky#IM's Avatar
    I joined the forums just to reply to this topic, as I found it while googling. I am having the exact same issues with my iphone 4 while using a Blitzsafe Aux input. I have tested it on 2 older 3G's, one with 3.2 and one with 4.0, and I could not duplicate the issue. With both mine and my wife's iPhone 4, the hissing noise is there and can be heard best when the music is low or in between songs. So this leads me to believe it is a hardware problem on the iphone 4's. However, I cannot duplicate the issue in a different car with an alpine v-link aux input adapter.

    It could be that the output volume of the iphone 4 is just too low and could possibly be bumped up by a software fix. There is a jailbroken app called 'volume boost' that does something with the values programmed for the max output on the phone. Other than this, I'm out of ideas.

    Anymore thoughts? What did the genius bar say?
    07-19-2010 01:11 PM
  15. iNitvizn's Avatar
    I had my iP4 hooked up to my car all day today and had no issues with what you describe. My car didn't have AUX, so I added one via a USA Spec unit. It's an ipod unit so I can control it through my steering wheel controls, but I forgot that cable so I had it plugged in through the AUX.

    Sound was crystal clear through it...mp3's and streaming. I didn't notice any difference between my old 3G and the new 4.
    07-19-2010 04:23 PM
  16. TechJunky#IM's Avatar
    Interesting. It has to be only when a certain set of circumstances are present, because like I said, I CAN NOT duplicate the issue on an Alpine head unit with just an Aux cable into the CD changer port. This is only on my car with a Blitzsafe audio adapter with RCA inputs, on a factory head unit. I'm still leaning toward an overall low output theory. Maybe different head units receive different levels for aux inputs.

    Mine is best described as a very faint white noise, mainly heard between tracks or on really quiet music. If you pause a track, you can hear it hiss, then a couple small pops followed by a whine...then it stops. Hit play then pause again, and it will do it again. It only does it when audio (ipod or streaming) is playing, but stops approximately 5 seconds after you pause or stop the music.

    Another thing I've noticed, if I wiggle the headphone jack, I can change the noises slightly.
    07-20-2010 12:53 PM
  17. understando's Avatar
    When I plug in via aux I don't have problems unless it is plugged into the charger. When charging I get alot of interference. Although I would say connecting via Bluetooth audio will give you far better quality than an aux cable. If you can't do that and it's still an issue try changing the cable out, it could be something as simple as a bad cable.
    07-20-2010 07:12 PM
  18. Rolf's Avatar
    I plug my phone into my car via a cassette adapter with no trouble at all. Occasionally it'll skip to the next song automatically which is odd, but that's iOS4 of course. I also can't have my volume on my phone at max or I get some distortion, but I believe that's due to a very cheap adapter/stereo. Having the charger plugged in makes no difference. EDGE and 3g both cause no feedback through the speakers. I drive a 1997 Malibu, by the way.
    07-21-2010 09:34 AM
  19. cardfan's Avatar
    Use a cassette adapter in my wife's car with no problem. That skipping to next song may just be shake to shuffle...i usually turn that off.

    In my car, i use a BT stereo. No issues there except when i get a phone call. It's a bit screwed up and have to switch to phone speaker. Hopefully 4.1 fixes the BT issues.
    07-21-2010 10:52 AM
  20. Bill McNeal's Avatar
    I never did wind up taking my phone to the genius bar. I was able to "solve" the problem on my own. If I turn the EQ off and turn the volume all the way up, the noise stops and everything is all good.

    Hopefully that can help out anyone else having the issue.
    08-19-2010 12:47 PM
  21. phil68's Avatar
    Thank you for the advice, I am having the same problem. Was listening to my ipod touch through cable and Aux with no problems, have now upgraded to iphone 4 and the sound is fuzzy. Not on all tracks confusingly, mostly just spoken word, music seems alright. The cable is fine and the iphone works fine with headphones. Anyway, you said you turned EQ off - what is EQ?
    12-12-2011 09:49 AM
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