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Adaptive AutoBias™
Exclusive to PrimaLuna, this circuit monitors and smoothly adjusts bias constantly and instantly. The
genius of this design is that the Adaptive AutoBias™ actually improves the overall sound quality and
performance of the amp. Between 12 and 30 Watts, measured distortion levels drop by over 40%. In
addition, tubes do not have to be matched, and there is no bias (re-)adjustments needed, ever.
Furthermore, the PrimaLuna is equipped with Soft-start™ , which brings the amplifier on line slowly to
prolong the life of internal components, including the tubes. This makes the PrimaLuna a joy to own
and operate.
While matched tubes are not a requirement, it is still recommended if you want to get the very best
results. You can get the very best in replacement tubes as well as rare vintage NOS (New Old Stock)
tubes from us and other parties if you wish to upgrade. In the USA, Upscale Audio's inventory of New
Old Stock tubes is the largest you can find. Elsewhere, independent suppliers can assist you to make
your best choice.
PrimaLuna® ProLogue Five