Wilson Witt series 1 speakers, very odd problem, help!


Ok so I have a pair of Wilson Witt series 1 speakers I purchased used approx. 4 months ago and was very happy with them.
Now I am experiencing a very odd problem.
Roughly 50% of the time when I start playing music through them the mid drivers do not work at all on either of them.
This usually occurs if I am playing at night and START at lower volume levels.
The next day I play them maybe at much higher start volume they will work just fine.
That is what is most peculiar to me, just how they can work one day but not the next and work again.
I am not sure it is directly related to volume but that does seem to be when they decide to not work.
Does anybody have an experience with this or have any ideas what possibly to look for?
Source does not matter, it could be tt or cd or tidal, and usually when the mid drivers are not working just turning up the volume does not make them work on that run.
Very very odd and I truly cannot fathom just how this can be happening at all?
128x128uberwaltz
An update to this as I played them this morning at higher volume, after being on vacation for a week.
Now the mids will not play at all and it sounds like the lh speaker tweeter is also on the fritz as just sibilance is all I can here.
maybe something on the crossover boards?
Any thoughts will help here, thank you
Take a picture and share it here of your speakers binding posts
 and Pics of mid woofers
@audioconnection 
what are you thinking on the binding posts? they are not overtightened etc?
the mid woofers themselves externally look like new, internally when I removed them to check for loose connections there was some very minor dust and light corrosion on the frame but that was it.
soldered connections were good.
I am leaning towards blown resistors on the crossover but have yet to figure out how to even get to them to check.
It looks like the side panels should come off but when I prised off the caps that I would have though covered a screw or bolt head all I saw was what looks like factory applied blob of adhesive?
will be calling Wilson tomorrow to try and get good info to proceed further.
Should be simple enough to replace the resistors if it is them but do not want to risk any damage to the speakers or finish monkying around trying to get into the them the WRONG WAY.
You have 2 offers for help, yet you question Johnny's (Audioconnection) rationale, and then say you will contact Wilson. 
Why bother posting?
B