If they're Dual 2s:
1) Connecting Positive to Positive & Negitive to Negitive on both subs will give you a .5ohm load. Ex.1:
++-- ++--
1ohm 1ohm = .5ohm @ amp
2) Connecting the Positive DOT to the Negitive DOT and running the remaining Positive and Negitive out on both subs will give you a 2ohm load.
Ex.2:
(+)-+(-) (+)-+(-)
4ohm 4ohm = 2ohm @ amp
If they'er Dual 4s:
1) Connecting Positive to Positive & Negitive to Negitive on both subs will give you a 1ohm load. Ex.1:
++-- ++--
2ohm 2ohm = 1ohm @ amp
2) Connecting the Positive DOT to the Negitive DOT and running the remaining Positive and Negitive out on both subs will give you a 4 ohm load.
Ex.2:
(+)-+(-) (+)-+(-)
8 ohm 8ohm = 4ohm @ amp
If 1 Sub is Dual 2 and 1 Sub is Dual 4:
1) Connecting Positive to Positive & Negitive to Negitive of both will make a 1.5 ohm load
2) Connecting Positive DOT to Negitive DOT and running the remaining Positive and Negitive out will make an unstable, retarted ohm load like 6ohm Up and Down....
3) Connecting Positive Dot to Negitive DOT and running the remaining Positive and Negitive on the Dual 2, and Positive to Positive & Negitive to Negitive on the Dual 4 will make something like an unstable 3 ohm load.
4) Connecting Positive to Positive & Negitive to Negitive on the Dual 2, and Positive DOT to the Negitive DOT and running the remaining Positive and Negitive ont he dual 4 will make something like an unstable 4.5 ohm load.
I think that's right.....
That should help you out some....