Does this speaker fit my widebody combo?

[rummy]

http://chicago.craigslist.org/wcl/msg/3188702009.html

I've tried a EVM 12L Proline speaker, and it was so deep that it didn't fit in my widebody Mark IV. I'm guessing maybe it was a P.A. EVM speaker? The speaker wouldn't sit without moving power tubes outwards, and it didn't seem right. Anyway, would this speaker fit my widebody Mark IV?
Thanks!

 

[MrMarkIII]

According to the spec sheet, it's 5.5 inches (138 mm) deep.