What speakers? If it wasn't wired for it, then I'd have to say there isn't going to be any benefit. The crossover is not designed to handle it for one. Biwiring is pretty much useless and biamping probably won't be worth it for a speaker of this quality either. Most likely, the speaker uses parts from another speaker in their lineup, but isn't wired the same so the second set of terminals is just there and simply not used. You are all set for active biamping, but that means adding an electronic x-over before the amplification stage, because you would be disconnecting the internal x-over anyway and just wiring the drivers to the terminals. For all that work and the cost of the x-overs and amps though, you might as well just put that money towards better speakers.
