Below is a picture of our Adaptive Auto Bias™ board installed in a unit. The genius of this design is tubes do not have to be matched, and there is no bias adjustments needed, ever. In addition, the PrimaLuna is equipped with Soft-start that brings the tubes up slowly to prolong life and prevent shorts. This makes the Prima Luna a joy to own and operate.
For a more technical perspective on Adaptive AutoBias, click here.
The Adaptive Auto Bias™ board actually improves the overall sound quality and performance. Between 12 and 35 watts measured distortion levels on the test bench drop by over 40%.
At full power, distortion drops by over 50%! No other manufacturer offers you this kind of build quality, performance and convenience anywhere near this price. In fact, we can't think of an a product that does exactly what the PrimaLuna does at ANY price.