Wiring Dual D1 coils?

[Jybfan04 1]

What wiring Options do I have with Dual D1 Coils for 1 and 2 subs need all the wiring possibilities.

Thanks in advance

[theabunai 3]

1 sub = 1/2 ohm OR 2 ohm

2 subs = .25 Ohm, 1ohm or 4ohm