Description

TAD BiasMaster 4 Octal Probes BM4

The TAD Bias Master BM4 is designed to measure the bias of up to four octal tubes. It allows you to monitor the bias current safely and easily. While adjusting the bias control pot of your amp, the BiasMaster(TM) displays the actual result, enabling you to set and evaluate the full range of biasing options your amp and tubes offer to find your ideal setting.

The bias setting significantly affects the amp’s response, break-up, and dynamic character. It measures the bias current of various tube types, including…