Hey Cam:
Personally, I would Just fan out the strands a bit on both ends, intertwine them, and twist them. Then a cap or electrical tape or shrink tube.

Then, bend the splices "flat" to the wire and wrap the whole think with tape or shrink tube.

It's not like you're wiring AC or anything...you just want to prevent loose strands from touching or it pulling apart easily.

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::