unknown & unresolved gear issue

[CosmicRay]

Hey folks!
So, third tune into the first set I'm smelling something burning.
Not the good kind. Sort of an electrical aroma.
White smoke is coming out the top port of my Greenboy Fearless F212.
Something was smoldering. However, the cab still works.
But I'm not sure about it's reliability.
Obviously something happened.
What was burning? The crossover perhaps?
What may have caused it?
How can I troubleshoot this?
I was using my usual set-up:
Fdeck HPF-Pre Series 3 >Alembic F-1X >Alembic SF-2 >Crest Pro-LITE 2.0 DSP
All that is ok, but now I have that insecure feeling about playing out with this cab.
Yeah, this sucks. Especially now since gigs are back.

 

[Bill Whitehurst]

I would open the cab and look closely at the crossover.
If it smoked enough to see it should have visible burn marks somewhere.

 

[CosmicRay]

Yes. Here's an update. Both 3012LF speakers work. The 6" speaker is not functioning. Most likely the crossover.
I had this cab built without the horn, so I'll try to contact the builder, or someone from Greenboy and see what they can suggest.
I guess next step is to see if the 6" speaker still works by itself, or was burnt out along with the crossover.
But to actually get to all that, looks like the top 15" has to come out. Damn.