bodger wrote:
Not quite DIY but here goes.I have found an ancient pair of Wharfedale
bookshelf speakers in the depths of the garage and would like to wire
them up to my separates system to use in another room.There are the
remains of two wires on the terminals,one is grey the other is grey
with a black trace.Can anyone tell me which is positive and negative
please.

If you want to be really sure, connect them and put the two speakers
close together and play some bass through them. Then reverse the leads.
The setup that is loudest is correct.