Series/Parallel - Four Speakers (Dual 4 ohm voice coils)
Four dual 4 ohm voice coil woofer should be wired with
the voice coil on each woofer in series and then
parallel the four woofer for a resulting
2 ohm load to the amplifier
Series/Parallel - Four Speakers (Dual 2 ohm voice coils)
Four dual 2 ohm voice coil woofers should be wired with
the voice coil on each woofer in series and then
parallel the four woofer for a resulting
1 ohm load to the amplifier