First of all let me say that up until the speaker in question started malfunctioning I have been very pleased with the product.
Let me preface this thread with the fact that I received the Monitor 50 in a box that looked to be in immaculate condition. Only once I started bringing the box upstairs did I hear a something moving around inside the box. I opened the box, took out the speaker, and snaked my hand through the hole in the bottom and pulled out a small triangular piece of wood with adhesive slathered on one end. I am kind of wondering if this is the nature of my problems right here.
I recently finished setting up a 5.1 surround system and once everything was connected and running things were great for a week. Then I noticed a rattle coming from my left front speaker, the Monitor 50. I took off the grille on the front and found that the top woofer was barely vibrating at all. Whenever it did it was making a horrible rattling sound.
I think the front cone on the woofer is pressed against something inside of the woofer itself. The only time the front cone moves is during lower-pitched bass sounds and it proceeds to rattle. For lack of a better example, this problem is especially noticeable during the loading music for the PS3 game Demon's Souls (I have attempted to find a link for it on the internet but have been unable to do so. Should I find it I'll post it).
Interestingly, lightly pushing down and to the left against the front cone of the woofer "unhitches" it from whatever is providing resistance and the woofer functions properly. I'd love it if I could just make some kind of adjustment but I have no clue how. I have read on another thread here about how to remove the woofer. I have yet to do so yet though because I'm concerned with how to affix it back inside. In addition, would it be possible to take the front cone off and tweak something inside to stop this problem?
I'm really hoping this is something I can do myself and that I don't have to ship this thing back to Polk. That would be pretty expensive and it sucks when your sound system is gimped after a week of light use.