What is the efficiency advantage of the DA-70 Series over other
amplifier designs?
As shown in the figure below, the ternary design has a 20% advantage
over binary Class D at music levels (typically 15% of full scale) and about
3 times the efficiency of analog
amplifiers!
The Power Supply
The foundation of all amplifier design is the power supply. For years
Stewart Audio has pioneered leading edge, power supply technology. All
Stewart Audio amplifiers feature a High-Frequency Switch Mode Power
Supply. Because of this use of advanced technology some explanation is
in order.
Conventional Power Supplies operating at 60Hz (standard line frequency)
recharge only 120 times per second, requiring their storage capacitors
and transformers to be quite large to supply the energy needed during
the intervals between cycles
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