Them there pain in the butookus screws are called Secuity Torx...
I have brand new woofers from the OEM that are the latest revision and make the R1000 sound like it use to and like a dream.
I beleive you may have debris between the voice coil and magnet from what you discribe and the woofer is not serviceable (per se).
Please email me at burkhardiREMOVE@hotmail.com
Please do not use the word "remove" in the address, it's there to keep the spambots from using my address.
Roku3 and Roku HD1000 [Rev B] on a Samsung HLP5674W DLP in the living room; a Roku2 and two Roku XS and a few SoundBridges.Win7; Kubuntu and XP via RT-N66U, E2000 and a switch or two. I own stock in Roku, it's just all in the form of hardware.Viva la Roku