True Class A operation has always been a Gryphon benchmark, simply because nothing in our experience can match the sonic glories of pure Class A.
Unfortunately, true Class A is even rarer today than when we originally introduced the DM100. Rising consumer awareness has forced some manufacturers to stop making outrageous, unsubstantiated claims of Class A power ratings that only exist in the fevered imagination of some marketing “expert”.
Still, there is a growing number of so-called “new” Class A topologies based on automatic biasing which somehow allows the amplifier to sense when the bias should increase to ensure constant Class A performance!
If such a thing were to work as claimed, it would be tantamount to a re-writing of the laws of physics. In order for an amplifier to be able to increase bias and stabilize thermally to instantaneously meet the dynamics of the input, it would have to be able to predict what is going to happen next on the recording. Auto-biasing can by nature only respond to something that has already happened and the bias will rush up and down in a desperate attempt to follow the last note.
Put bluntly, there is no such thing as a free lunch when it comes to pure Class A, so we state with no apologies: True, pure CLASS A means heavy transformers, very large heatsinks, lots of heat, lots of electricity, expensive parts and costly assembly.
We appreciate and endorse every effort to conserve energy and preserve our global resources, but our research into efforts to obtain Class A performance from alternative amplifier topologies makes it clear that there simply is no substitute for the sheer magic of pure class A.
However, based on thorough analysis of typical listening situations, we have devised Gryphon Green Bias, a Gryphon invention (green for substantially reduced environmental impact). Green Bias offers true, pure CLASS A with considerably lower power consumption.
Any combination of Gryphon preamp and power amp with Green Bias control allows the user to select the amount of Class A required to run his speakers fully in Class A at any given time, taking into account such factors as speaker sensitivity, room size, musical dynamics and overall volume level. Programmable Class A bias is an efficient, convenient means of reducing power consumption without compromising Class A performance.
While Green Bias does not offer the extreme low power consumption of Class A/B, or even the low power consumption of “auto-biasing” systems, it does offer significantly lower power consumption without sacrifice or compromise of even a fraction of its pure CLASS A performance.