Hi Danny,
I picked up some old Onix ERT tweeters to pair with my upgraded Strata Mini’s. They were super cheap but allegedly worked.
I received them and the volume knob (passive volume control) was supposed to only have four settings. Immediately I noticed the knob just spins.
I hooked up anyways and of course they didn’t work. I popped open the tweeter and see the obvious issue as expected. See pic.
I think I may just upgrade these as the design seems simple. I would bypass the broken knob/resistor bundle but don’t know the values.
Did you help design these per chance? Any idea the resistor values? (I can call if needed)

Thanks,Onix ERT
Robert