[NoiSeeVT]

I would love to say it is the deck but the problem with that is that when he holds the speaker in hand it works fine. hence you are on the right track. Now inside the speaker if can see depending on the basket there are usually the 2 wires inside going to the voice coil now as these move they may be catching a contac point. When manufactured they may have been made to long. Now if you remove only 1 speaker do the other work and you will have to do this with all the speakers, try each one then see if it then works seeing if 1 or all the speakers are bad. the idea is to eliminate as many things as possible if its 2 speakers that do the same thing. To be continued......

David

edit 1 more thing when in hand not touching the door is the door opened or closed and does the door being opened or closed make a differencce when mounted (ie wire pinched.