I have a pair of The New Advent Loudspeakers which I probably bought in the 1970s. I refoamed them once about 15 years ago. One has gone out, and I suspect the problem is that the nut in the back that holds the speaker wire connection has gone loose. The little sharp pointed holder for the nut seems flat, and the nut just spins. Can I repair this? The backs of these are not removable. The cup that holds the connections in place is molded out of mdf and glued into the back firmly; o it's not a plastic one like contemporary speakers use. I'm using these in my office connected to an old receiver and to my PC. So perfect fidelity is not my goal. I know I could buy a decent sounding pair of computer speakers for $100 or so, but I hate to do that for a tiny piece of defective hardware if I can fix this. Many thanks.
