As you might have seen from another topic, I'm loving my new 2007 550i except for... the AUXiliary input! Especially when I play music that is recorded at a softer level (read higher amplification) through my iPhone or iPod I'm getting a LOT of interference (high frequency noise and tones), too much to enjoy the music. At the same volume level I do not hear the interference when the navigation cuts in or the radio is on.

I brought it to the dealer and the service person claimed it was "Normal" - can anybody else attest to that? Thanks in advance!!

Have you tried playing with the settings on the iPhone equalizer - I think there is a mode that boosts or normalizes the output level.

Appreciate the suggestion! Unfortunately, you can even hear the interference with the iPhone on pause so I don't believe it's related to any settings on the device; are you using the Aux w/o any issues?

I am using the AUX in on my 08 528i hooked to my iPhone and I have no problem with the sound. You might want to try another audio cable, or another device if possible. The other thing that comes to mind is that the sound coming out of the headphone jack on iPods/iPhones is volume-dependent, whereas the sound out of the bottom(dock) connector is line-level(constant volume). Google "ipod cable dock connector to line level" to find a cable that plugs into the bottom of your iPhone, and has a line-level 1/8th inch jack on the other end. Also, make sure you don't have the volume cranked too high on the iPhone. I usually have mine two "click" below the max volume, and then I control the volume on the stereo.

http://ecx.images-amazon.com/images/I/31kMprmMj9L.jpg

Heres the steps ive taken for better sound quality
- Aux mod (you take out the resistors)
- Update all of your songs and put their volume all the way to the max (you do this by selecting all, or just one and pressing "ctrl i" or mac users is "apple i" Then hit the options tab and you will see "volume adjustment" Turn that up to +100%
- When playing a song from your ipod (depending on the song) i normally keep it 2 clicks from the max.

Also i found it has helped since i have the average crappy sound system to turn the settings on your iphone to bass booster.

Hi,

Don't mean to derail the thread at all...but I am a new 550 owner as well - where exactly is the aux input? Thanks!

Thanks, I've tried using the headphone jack as well as the dock connector (both on my iPhone and iPod) and all sound equally bad. I'm curious if you have your iPod/iPhone on "pause" and crank up the volume (when plugged into the AUX), do you hear any interference? It's not static, more like a "buzzing" sound.


Those are some good tips I'll try out. Would you mind clarifying what you mean by taking out the resistors?

No problem! Mine is located on the rear passenger climate control panel (not the most convenient spot ;) )...

Hey how and where u take the resister out ? thanks :thumbsup:

lol yeah i think its a nice spot, but some of my friends said that its weird and useless lolll shame on them hehehe