Screw on banana/spade connectors

The locking bananas are ultrasonically welded on the 4S11 at BJC. Works for me.

One can learn how to solder cables to connectors properly.
It does take investment in the tools to do so.  These likely will cost less than what's being soldered together, but that's just a guess....about the parts, that is...
A bit of practice, et voila!  A permanent joint

If it's temporary, 'screw around'.
If it's soldered, it's Done. Back to fun....

...but this is fine for 'normal' cables and connectors; esoteric items are best sent back to their home planet, where the 'natives' know-how...
...and charge handsomely for it....

Ask yourself how much solder your electrician used in the 250 A panel at your service entrance.

These spades or banana male are loved by many (me).

http://www.wbtusa.com/pages/bananas_spades.html

Cut off anything, strip, nice fresh wire, attached.

I like these too, great ends, and not a slot screw, a hex,  can really get it tight, if you tin your ends, I do, they never come loose after a good cookin' and a second retighten. Second they are insulated in case of some of the older, very closely spaced speaker/ amp terminals.
Can always die off the gold plating and get to the bare copper, when you torque um up, too, your call.

Regards

I just bought Blue Gene's cable Locking Banana plugs, set screw style and for the price I'm very impressed with the quality