6 four ohm coils.
2 dvc 4ohm
2svc 4ohm
first lets take the 2 DVC subs and make them 2 SVC subs.
So wire the the speaker inputs on each sub in series to get two 8ohm subs
Now take the two SVC subs and wire the two of them together in series to make them 8ohms
You now have three pairs(+,-) speaker wires to hook to the amp.
Wire these three in parrallel at the amps speaker terminals.
Three 8ohm loads in parellel
The amp will now see a 2.666666667 ohm load
Another option
Take the 2 DVC subs and wire all of their coils in parralell (jump the positive over to each of the other positive terminals of the DVC woofers, same with negative)
This will give a 1ohm load, (4, 4ohm coils in parrallel)
Take the 2 svc subs and do the same, this will give a 2ohm load
You now have two pairs of speaker wires(+,-) to hook to the amp.
If you wire the two pairs in series you will get a 3ohm load
If you wire the 2 pairs in parrallel you will get a .66666666.. ohm load