Tinsel is the fancy name for the flexible wire that goes from the voice coil to the speaker terminals/lugs.
...Back when i worked at the papermill we used this copper tinsel wire but it was called Static Wire used to combat static on machines that ran paper for paper products.
well this stuff looked like Christmas tree tinsel only copper .

It's for durability. The wire is in constant motion so something that can carry current and be extremely flexible is in order.Hmm, you know, I wonder if the static thing is one of the reasons they use it for speakers too.
Thanks Goo...Looks great,nice work.