I've been using pre-fab boxes for a while and love the simplicity of terminal cups but the past two times I've used them they've quit working.
The first one just quit working one day. It shows no visible signs of any reasons of why it wouldn't work and I get power all the way up to the terminal but it just doesn't conduct through to the other side. The same thing happened to another cup that I took out of an old box I don't use and the same thing happened to it in about two months.
I've solved the problem by just running my speaker wire from my amp to my sub through the port on the box but I just hate the way it looks.
Can anyone explain why this is happening?