AMI is Archut Manufacturing Industries. It is the parent company of the popular Tab-Funkenwerk brand of preamps, as well as the AMI microphone transformer product line.
Oliver Archut’s AMI is a source for high-quality aftermarket microphone repair and upgrade parts.
AMI manufactures at least 13 models of microphone output transformer, including two versions of the BV8 (for U47/U48), the BV11 (M49/M50), BV12 (U67), and numerous models designed as drop-in upgrades for popular ribbon, condenser, and dynamic microphones.
The company has introduced metalwork kits for the U47 and C12.