Amplifier Highlights

Zero feedback.

Balanced and isolated input and outputs.

Output configurable to drive any impedance load, from electrostatics to sub-ohm parallel linear array loudspeakers

Good EMI/RFI performance.

Low voltage operation ( sub 60 volts ), no potentially lethal HT.

Only two power semiconductors required for Push Pull version.

Minimum components, little opportunity for noise generation (150 dB signal to noise ratio).

No capacitors in the audio signal path.

"Direct" signal connection from input to output.

Zeus General Amplifier Schematic

Zeus 75 Distortion versus Power Output.

Use with 4 ohm impedance speakers with 2:1 step down output is not normally recommended but this graph is to demonstrate the amplifier operation where distortion level plateaus at 1% (unlike conventional amplifiers where it would continue to rise).

Power at maximum output is over 100 watts.

Note: Full Class A or Class AB operation depends on output transformer configuration, mosfet bias level and load being driven.

DIY

	Building a Zeus 75 - Information on Construction
	Input Transformer Specification
	Output Transformer Specification - 75W
	MOSFET Matching with L200 Current Source
	FFT Test Result with 2SK1529 Audio FETs