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6 of 7 people found this helpful
Audio cross-talk issues
on 27 March 2013
Considering how much I paid for this thing, I'm happy with it.
However, when playing music from SD, USB or AUX at higher volumes (above 35) you can hear the FM radio fuzzing through quietly during the silent parts. Also, at most volumes (quiet and loud) you can hear a faint ticking fuzzy noise like "chiffchiffchiffchiff" which seems to go away around a sweet spot of volume 35 or near it; this sounds like interference as the SD card is being read/accessed. All of the interference described happens whether my engine is running or not, so it's not the car's electronics.
One final weird anomaly which is probably more to do with the poor quality charger I use for my phone: When using the AUX feature from my smartphone while it's plugged into the cigarette lighter to charge, I can hear my alternator loudly through the speakers! This manifests as a high pitched tone which changes with my engine revs. This is great for pretending I drive an F1 car/jet airplane but when I listen to music from my phone I have to take it off charge!
My conclusion is that it seems like a great unit for the price, but it suffers from poor insulation/grounding/shielding and you will experience some interference if you have sensitive ears.