Eminence Private Jack speakers

I read that these speakers are good for blues, indie, and jazz, but I also read that they are modelled after the Celestion Greenbacks. Would anyone know if the Private Jacks would work well with a marshall jcm800 for hard rock tones? Thanks

not sure about the private jacks, but I just put 2 Governor's and 2 Wizards in a Marshall 1960a 4x12 cab, and they sound great for hard rock.

Here's a thread I started about them