Carvin MTS-Legacy-ValveMaster Gold Pin Option

These are all adjustable bias amps and all you need to check and adjust the bias is a Multimeter if you use the Carvin method. For more accuracy you can also use a bias probe and a Multimeter, or our all-in-one Eurotubes "Pro One" bias probe that reads both the plate current and the plate voltage simultaneously. These are available under the "Related Products" tab.

You can use our Carvin bias video for reference which we did on a V3. The bias for the MTS and Legacy amps is the same.

The video below explains the difference between bias probe types.