Lots of tube preamps don't require manual biasing. If a tube gets noisy switch sides to determine which tube is noisy, and then replace.
Also typically you should warm up tube amps about 30 minutes before biasing.
Lamm recommends a Fluke meters (Specific models on their website) because cheap Multimeters are not accurate enough. My Music Reference RM9 has bias lights built-in which made life really easy!
Also typically you should warm up tube amps about 30 minutes before biasing.
Lamm recommends a Fluke meters (Specific models on their website) because cheap Multimeters are not accurate enough. My Music Reference RM9 has bias lights built-in which made life really easy!