Thanks for the comments/questions.
Originally Posted by Tybalt39
Do you get the noise if you run a cable directly from the iPod headphone output into the AUX connection on the 130 (no power adapter or anything else, just the cable & iPod and the 130)?
Sorry for an incomplete rundown of my testing, there is no interference without the Monster power adapter. This is one where the multipin feeds audio to the power plug (and plug feeds power to the iPod), and the plug has a 3.5mm plug for audio out. A nice one cord chain location to location. So I imagine the interference/add-in, is the nature of sharing the audio and power on the same line, and for some reason the WK2, or mine anyway, picks up the add-in.
Originally Posted by z0lt3c
Sounds like either alt noise or a bad multipin connection. Alt noise would amplify as you drive, usually changes in pitch. Solved w ground loop isolator or noise suppresor. Sometimes may stop if the ipod is fully charged and not drawing power. For bad connector, jiggle connector and see if it improves. Could be either end but i would suspect the monster cable unless it works fine in another car or with another iPod. I use the usb port in the center console (or plan to).
It worked fine in my previous car, so some sort of better grounding or power conditioning/regulation might be necessary for the WK2. Hence my question, if anyone has detected the auditory disturbance, if or if not, and what adapter they're using. I trust Monster, but in this case I don't want to buy the same thing (newer version though) unless others have been problem free.
One thing I haven't tried, could be using the iPod 3.5mm direct to the 130, and the multipin to power only. Of course I really like just one cord running from the iPod not two, but this might be a good enough solution. Still open to hear what others are using though, in case I seek a replacement.