rig set-up question?

[daveid]

currently im playing out of an orange rockerverb 50 head and 2 marshall jcm1960 cabs. setting this up was a no brainer. however, i recently required a sunn 6x10cab. there is no ohm listing on the cab its self and all i have found online as far as info about them is that they were rated at 6 ohms. is there any way to use the sunn as well as a marshall together. the orange head has 1-16ohm speaker output. and 2 8 ohm outs. the marshall can run either 4 or 16 ohms. and i have no idea if this is possible without rewiring the amps to match. please help.