The Antileon EVO Mono is a mono power amplifier from Gryphon Audio, built as a genuine single-channel design rather than the bridged stereo-to-mono conversion most rival manufacturers use for their monoblocks. Gryphon Audio was founded in 1985 by Flemming Rasmussen, and this monoblock doubles the transformer capacity and the number of transistors and power capacitors operating in each channel compared with the equivalent stereo Antileon EVO, specifically to handle demanding high-end loudspeakers with low sensitivity, low impedance and large phase angles.
Key specs that matter
Rated output is 175 W pure Class A per monoblock, delivered through parallel coupling rather than bridging or series coupling - an important distinction, since parallel coupling reduces distortion and output impedance by 50% while doubling both damping factor and current capability compared with a conventional bridged design. The amplifier uses 40 high-current bipolar output transistors, a 670,000 microfarad power capacitor bank, and a newly developed ultrafast J-FET input stage. Frequency response is flat to beyond 350kHz. A fully balanced input and Voltage Amplifier Stage feeds a custom-developed ultra-low noise regulated power supply, with DC servo circuitry using Mundorf RXF Polypropylene capacitors for power supply decoupling. True Class A bias means full current is instantaneously available at all times regardless of load, a design philosophy Gryphon specifically contrasts against rival schemes that merely simulate Class A by switching bias levels when a dynamic signal is detected. Weight is approximately 90kg net per chassis.
Sound and use context
Expect an effortless, high-control presentation with instantaneous current delivery under any load - true Class A operation at this scale requires heavy transformers, high electrical consumption, substantial heatsinks and considerable heat generation, but delivers a character Gryphon describes as impossible to replicate through any shortcut or cost-reduced alternative approach.
Pairing
The fully balanced input works with any modern preamplifier, and the doubled current capability from parallel coupling makes this monoblock well suited to driving difficult, low-impedance loudspeakers that would challenge a conventional bridged monoblock design.
Alternatives
Gryphon Audio's flagship Antileon Revelation Mono sits above this model as the brand's newest benchmark in monoblock amplification, worth the further investment if this Antileon EVO's already substantial Class A engineering still leaves ambitions unmet given the considerable price and installation planning either option represents.