The Problem:
You want to replace the binding posts in your amplifier, but the holes in the chassis are too large for most binding posts on the market, which are designed to fit chassis cut-outs of 10mm or 11.5mm in diameter.
The Solution:
Hoppe’s Brain Binding Post Adapter Plates.
Two fiberglass plates sandwich the sheet metal, and the binding posts fit into the plates, which are firmly attached with four M3 screws and locknuts. Simple, secure, and easy to install and service.