so the subs are dual 4 ohm voice coils........and your looking at a 2 channel amp thats stable at 2 ohms.......you're on the right track.
so basically u have a couple options wiring wise.....you could run each sub down to 2 ohms and run the amp at 2 ohm stereo.......then u would be getting 400x2 with the specificied amp above..
you could also run series parallel i believe....but running each sub up to 8 ohms, then run them in series to the amplifier.....you would be running 4 ohms mono at that point....all a preference if you want stereo or not.
but if these subs are rated at 700watts RMS each....i'd try bumping up the watts a little. Ultimate Electronics has a sale on BD1000'* this week.......get 1 for each sub
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