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Wiring two post speakers with biwire cable

I have speakers with one pair of binding posts each. My amp has four binding posts for each channel (biwiring capable).

I have a set of biwire cables (one end has two terminations, + and -, the other end has four, two + and two -).

Is is safe to connect all four terminations at the end of this cable to the two posts on each speaker, or should I leave one set of + and - unconnected? What if I connected the four termination end to the amp and the two termination end to the speaker?

I don't want to run into any problems with running cables in parallel, messing with impedance, etc. Thanks.
turnaround

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turnaround OP
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The speaker cables are 8' harmonic tech pro 9+, which have four terminations on the speaker end. My speakers are Thiels, which have a 4 ohm impedence rating.

I am wondering if it's okay to go with what I have, or if (for safety or sound reasons) I should consider cables with just two terminations on the speaker end.

Can you explain more about this idea of the shotgun configuration -- how/why does that work, and on what systems what would it be good or bad?
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