Quote Originally Posted by awkwardbydesign View Post
I actually have some speaker plugs from A&B Systems- http://www.ebay.co.uk/itm/A-B-System...item3a7d447b6b
I wonder what "bronze" means.
Brass is copper and zinc.
Bronze is copper and tin.

From personal experience with Chinese alloys my guess is mostly tin with just a little copper for color then a flash plate of Rhodium on the outside.
A little scrapping with a needle file will speak volumes.