Up for sale here is this complete set of speaker terminals for a Pioneer SX-450, SX-550, SX-580, SX-680, SX-780, or SX-880. This is guaranteed to work for you. These may work on other Pioneer receivers and possibly on other receiver brands as well. Please see my pictures for details.

US shipping and handling is $5, and international is $18. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.

I have more Pioneer parts and other vintage electronics listed--feel free to take a look!