Bias Master System BM4 TAD, with 4 Octal Sockets – Tube Bias Measuring Meter
Includes 4 octal probes (2xS-TBMA2 ) and english/german operation manual. USA TAD Authorized Dealer. The BiasMaster™ allows to monitor the bias current safely and easily. The Bias setting has a dramatic impact on the amp’s response, break-up and dynamic character.