Dual voice coil wiring

[Hydrogen]

Hello, I'm currently ordering a new subwoofer for my system, it's a Ground Zero GZRW 12D2.

I'm using a Ground Zero 2155X amplifier which is underpowering the sub but it isn't a matter because I will be getting a new amp soon.

My question is, the sub has 2x 2Ohm coils. My amplifier can put out 100W each channel at 4Ohms, 150W on each channel at 2Ohms and 300W-400W (?) bridged 4Ohms.

Do you think I should connect one coil to one channel, other to other with a mono signal so both outputs are the same and don't destroy the subwoofer or just put the voice coils in series to get a 4Ohm load and bridge it?

Thanks for the help.

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[garychoffmann 10+ year member]

4 ohm bridged