If you have an active crossover,
then by all means set the high pass for something above 120 Hz,
feed that output to your amp and isolate the ribbon input wires
and connect your amp directly to those.
Two things to be mindful of:
1.) Make sure your amp can handle a 4 ohm load.
2.) Don't crank the hell out of them because you're bypassing the fuses this way.
Although the manual says they play down to 22 Hz, don't even consider it.
Play it safe and cross above 120.
For this test, it might be a good idea to go 200 Hz.
I think they'll also have a kinda nasty peak around 6 kHz without the crossover, so keep that in mind.
For reference, I cross my 60" ribbons at 190 Hz and absolutely drive the crap out of them. Fused, of course.
What Treitz said is spot on about pianos and female vocals.
James likes to play Linus and Lucy (Yes, that Charlie Brown song.)
EDIT: Right click, save file as:http://www.carveraudio.com/music/LinusLucy.mp3
It's a great track for checking ribbons.
As far as the hole goes:
I've heard of electrostatics having holes and playing just fine.
No idea about these ribbons though.
Half the size of a penny is pretty significant.
Hopefully James gets the surrounds sometime soon and you can get the woofers ironed out for cheap.
Then it might make sense to splurge on a ribbon repair if necessary.
They did both of mine and they take whatever you can throw at 'em.