I’m still wondering about opening them. I’m comfortable with mains power and have built active speakers before. I can still send them in if I fail, and worst case it'll cost me the price of one new Orbit 11. No risk, no fun...
There are actually two notches on opposite sides of the inner diameter of the cover ring. I tried prying very carefully, with a plastic tool, but nothing moved. I'm afraid to use more force without knowing that's the right way. Might there also be glue?
The notches also remind me a bit of similar notches on camera lenses, where you need a tool to insert into both notches simultaneously, and then you turn. The woofers are much bigger, but could the same be the case here?
Any other ideas? (If I’m derailing the thread with this, please let me know where to take it.)