Copper foil

gentlemen:

how do you terminate such thin foil ?

The ends can be folded down to a pointed triangle and shaped with needle-nose pliers for crimping & soldering inside a convention spade. Alternatively the ends can be folded into several thicknesses and punched for direct copper termination. A Cardas no-stress binding post is perfect for this, as it clamps down without twisting.

Mrtennis, I use silver rhodium spades sourced from Home Grown. To start the narrowing of the ends, I gently curve the edges into a U. I snip the last three centimeters into strips for intertwining. The spades have two allen bolts that secure the intwined copper.

My amps have to be carefully guarded against shorts. That is why I use clean spades. Bare ending the copper to the speaker terminals may be advantageous.

"I just added a single tail copper foil to the negative side of my speakers...".

Forgive my ignorance but what is this DIY about? Thanks in advance.

Ghosthouse does 2130 H mean anything to you?

This is the easiest DIY in audio. The returns are way and above any justifiable
expectation.