thanks for the help, friends.
see link:
Four 2 ohm Dual-Voice Coil Subwoofers
Using coil 1 on all 4 speakers , wire in a series parallel to get 2 ohms (2 + 2) / / (2 + 2) = 2 . That connects to output 1.
Using coil 2 on all 4 speakers , wire in a series parallel to get 2 ohms (2 + 2) / / (2...