Biasing The Dt50 212 Combo in DT50 / DT25 Posted September 18, 2013 Thanks for the tip guys. Appreciate it much. I did come across that thread mention, but i am thinking of something somewhere along the line of a video tutorial, or something with pictures, indicating step by step, what to do, what to touch, and what NOT to touch. As mention by spaceatl, it can really kill you....life is precious...and i don't wanna loose mine just yet...lol =P That thread also did mention of using a Dual Bias Tester. Is there anyway to bias the amp without needed to purchase the tester? Just wondering if anyone has done it with just a screwdriver to adjust the pot and also plus with just a multimeter... ?