Logitech Z5300 Sub rattle

[hobogloves]

Hi... I RMA'd my z560 system, but since that is discontinued I got the z5300 system in return. A week or so after setting up the z5300 system, I'm noticing when I put the volume above half or so the sub rattles. If you look at the sub from the front (Logitech THX logo looking at you) it rattles from the top right it seems. Anyone having this problem? I've tried the reccomendations for ratting problems with the z680 system and that didn't work. Checked the plastic ported hole... Checked for loose wires etc. and nothing.... Anyone know what I could do? Would be annoying to RMA again but it appears as though I might have to... Thanks in advance for any advice.

[shard]

see if the sub is on a stable ground, i used to have a good sized sub on my hardwood floors and it would shake rattle and roll, i put some pads on the legs, and it stopped, that might be your problem, and also, is it set level? that could be another issue

and lastly, you might have a air leak somewhere, not sure where though, go over every part of the box.

and do you have your equalizer on your comp set to have a higher bass curve? it might be cuaseing so much bass for that sub