The WBT's come to mind but they are very expensive. Cardas makes them as well as a few other cable manufacturers. You will either need a tech to do it or be very handy with a soldering iron.
Heavy Duty Binding posts for Krell KSA 250
Looking to find out if any folks out there have found and installed a more robust binding post for the older Krells, like the KSA 250. Hopefully without any modifications to the amp. The stock plastic post used on that amp does not really accommodate today's larger spaded speaker cables all that well. Any suggestions are appreciated!