2:90, Recto Pre, and Mixing cabs Mesa and Marshall

[mightywarlock]

so last week my Marshall el34 100/100 bit the big one, and i cant afford to fix it right now, so it goes into storage. So i dug out my 2:90 from my bigger rack and tossed it into my main gigging rack, which i also have a recto pre which just has incredible tone, (as well as a non connected jmp-1...which might disappear for the prophesy in my other rack).
i currently have 1- marshall 1960A (g75's) and 2- Mesa 4x3 recto cabs.
I am picking up a rectifier 2x12 as well...and got to thinking...

any idea how this would sound??

if i mixed the Marshall cab, the 1960A (tossed the rack on top), then tossed the Mesa 2x12 on top of the rack? how would i connect them out of the 2:90? Side A 8 ohms out to the mono 16ohms input on the marshall cab? (safe mismatch right?) and then the B side out 8ohms to 8ohms? or am i going 4ohms to the Mesa 2x12 now (the 2x12 only has an 8ohm input jack)? are the 2 channels completely independent or do they share the outputs?

(this is why i wanted to use the marshall power amp...it was 16ohms/8ohms switchable independently, so could run 1 side 16ohms, the other 8...but since it did the typical marshall thing and broke, i guess it doesnt matter now).

help?

 

[LUCRETIA]

Side A 8 ohms out to the mono 16ohms input on the marshall cab (safe mismatch) and then the B side out 8ohms to 8ohms mesa cab

Correct.

 

[mightywarlock]

so the a and b side are independent then?
ok...

thanks

8)