Ah, the traditional Western Union lineman's splice - this thing has been around for over a century and even NASA endorses it! Nice insulating goop, may come in handy someday.
Exactly, why reinvent the wheel (or in this case lineman splice). I like someone who knows there knots....you should see my indoor hanging washing line fix video That knot is a thing of beauty. Please do like the video and subscribe as really helps me.
The best bet is to consider the required wire spec for that speaker and match it. Honestly, I would take advice of experts like those at Richersounds who, if you know speaker and wire used, can recommend. Hope helps. Please do like the video and subscribe as it really helps me