Gryphon Audio

Gryphon Audio Antileon EVO Mono Power Amplifier (pair)


While monoblock power amplifiers are by no means rare in the uppermost echelons of High End audio, few – if any – are executed as conscientiously and uncompromisingly as the single-channel Gryphon Antileon EVO Monoblock. More than 90% of all other mono amplifiers have been “designed” easily and speedily, simply by bridging the two channels of an existing stereo model.

Unfortunately, while bridging increases nominal output power, other critical parameters take a major hit.
Because the Gryphon EVO monoblock employs parallel-coupling instead of series coupling (bridging), distortion is cut in half, damping factor is doubled and output impedance is cut in half, doubling current capability for absolute control of loudspeaker loads as low as 1 Ohm.

Two physically independent audio channels on separate chassis effectively eliminates any interaction or interference between the two channels for infinite separation and the rock-solid holographic imaging that has become a Gryphon hallmark.

With completely separate power supplies isolated on independent chassis, even the most extreme instantaneous current draw in one channel will have no impact whatsoever on the other channel. The ready availability of high current on demand lends an effortless smoothness and consistency to the musical performance of the Gryphon Antileon EVO monoblock, even at realistic concert hall levels.

As a single-channel design, the Gryphon Antileon EVO monoblock doubles the transformer capacity and the number of transistors and power capacitors operating in each channel, enhancing its suitability for use with typical High End loudspeakers with low sensitivity, low impedance and large phase angles.

Class A Bias

Gryphon Antileon EVO employs true Class A bias for instantaneous availability of full current at all times.

Gryphon rejects any biasing scheme which attempts to simulate Class A bias by switching to a higher bias level when a more dynamic signal is detected. This type of sensor can only respond after the fact, because it is not possible to adjust bias rapidly enough to accurately “track” dynamic changes in real time in music which is rich in impulses.

For situations in which the full power of the Antileon EVO will not be required (a small room, undemanding music, background listening, efficient loudspeakers, etc.) the owner has the option of selecting full or reduced Class A bias via front panel controls.

For a more flexible approach, when paired with a Gryphon preamplifier via Gryphon’s proprietary Green Bias Link, power amplifier bias can be adjusted automatically in relation to the position of the preamplifier’s volume control. The user always has Class A power on tap as needed at any given time with massive power reserves ready

Deep Inside

Naturally, there is a lot going on beneath the lid of a fully discrete, pure-Class A, fully balanced power amplifier with twin-tiered banks of electrolytic capacitors.

The twin custom-designed 1500W toroidal power supply transformers are mechanically isolated from the chassis. A special epoxy resin is used to optimise vibration damping for the transformer. For additional isolation, the shielded, epoxy-damped housing is mounted in a suspension system for effective vibration control.

Apart from the shielded transformer housing, only non-magnetic materials are employed throughout the Gryphon Antileon EVO.

The separate driver section incorporates its own generous, independently regulated bank of proprietary Gryphon capacitors powered from separate windings on the transformers. A unique mechanical design provides optimal thermal tracking between drivers and output devices.

Bypass capacitors are placed close to the output transistors, not, as is conventionally the case, right up against the power capacitors. This contributes to significantly enhanced high frequency performance.

Internal wiring is kept to an absolute minimum with only a single short length of Gryphon Guideline Reference gold-embedded silver wire.

Two sets of rugged gold-plated binding posts of Gryphon’s own design are provided for bi-wiring. The multi-way proprietary terminals accept bare wire, spade lugs, banana connectors or any combination of these.

Diagnostics and Security

The unique, non-invasive Gryphon protection system provides reliable protection with no fuses in the signal path and without compromising signal purity and simplicity. Gryphon Antileon EVO is an exceptional powerhouse amplifier that does not require the false security of sonically degrading relays in the signal path to the speaker.

Gryphon Antileon EVO incorporates full diagnostic firmware, accessible at the press of a single button to run a series of tests to monitor proper operation.

Fit and Finish

Acknowledging that the Gryphon EVO will be a heavy, imposing addition to any living space, Flemming E. Rasmussen, Gryphon’s founder and a trained artist and industrial designer, has styled it to make a bold, sculptural statement that is as functional as it is elegant.

Every chassis component is fitted to the next with extreme precision for a rigid, non-resonant structure, while each piece is machined to excruciatingly tight tolerances. The perforated top plate provides ventilation for added heat dissipation.

The faceplate is machined out of a solid 40 mm black acrylic block that houses the LED display and the easily accessible front panel controls. While an acrylic faceplate of this thickness is more costly than conventional aluminium, Gryphon’s artistic souls prefer it for its high gloss sheen and striking textural contrast to the amplifier’s aluminium surfaces.

With the exception of the faceplate, the Antileon EVO exterior consists entirely of brushed, black anodized aluminium with countersunk Allen screws for a seamless appearance.

At home in the finest interior, the battleship build quality combines with stylish, organic form to create an object of timeless beauty to match the exquisite pleasure of listening to music re-created by the Gryphon Antileon EVO power amplifier.


  • Exterior design by Flemming E. Rasmussen
  • Electronics design by Tom Møller
  • 175 Watts Pure Class A mono
  • Parallel coupling (not bridging/series coupling) reduces distortion and output impedance by 50%, doubles damping factor and current capability
  • Fully balanced input and Voltage Amplifier Stage (VAS)
  • 40 High current bipolar output transistors
  • 670,000 µF power capacitor bank
  • Newly developed ultrafast J-FET input stage
  • Custom-developed ultra-low noise regulated power supply for voltage amplifier stage (VAS).
  • DC servo circuitry with Mundorf RXF Polypropylene capacitors for power supply decoupling
  • Takman REY precision resistors
  • Flat frequency response to beyond 350 kHz
  • Gryphon Guideline Reference gold-embedded silver internal wiring
  • Custom-built dual toroidal transformers
  • Shielded, epoxy-damped transformer casings suspended for effective vibration isolation
  • Isolated power supply for display and control circuits
  • No output relays
  • Frequency-independent damping factor
  • Proprietary Gryphon double binding posts
  • Automatic Green Class A bias setting or manual Low/High bias selection
  • AC power status and polarity display
  • Rigid mechanical structure
  • Microprocessor-controlled non-invasive “smart” protection system
  • Double sealed, mil spec PCB with 105 µm copper traces
  • Upgradeable microprocessor software

We are in the process of updating our Doug Brady Hi Fi website, which now provides you with automatic real-time stock updates. .

When viewing a product listing page, click on the option/colour of the product you require then you'll see one of the following stock indicators.

Stock Information : We have (this number of your chosen variant) in stock. 

In Stock - Order Now - Delivered free to you on [delivery-date] 

This item is brand new and guaranteed in stock from our shop stock.
Our shop stock will be dispatched on the date displayed on the product page, delivery will be booked for the delivery date displayed. We will send you a DPD tracking number where you will be given a 1 hour time slot on the day of delivery. 


In Stock - 2-3 day Dispatch - Delivered to you FREE by  [delivery-date] 

This item is brand new and in stock at our off site warehouse.
Stock being dispatched from our off site warehouse may take a day or two longer for you to receive. We may also dispatched directly from the manufacturer or distributor. This is often the case for particularly large or heavy items where specialized service is required. For anything which can take time to get to you, we'll contact you quickly.

Available to Order - ☎ - 01925 828009

Availably to order. Occasionally, due to stock demand, we can sell out. We either have this on order with stock due in or we do not usually have back up stock of this item in store. When you make a purchase, we will inform you quickly when the item is due in from the manufacturer and deliver as soon as it arrives with us. Usually this is only a short wait of 3 - 5 days, we will contact you with a estimated delivery time.

Sold Out

This item is currently sold out with the supplier or manufacturer please call us so we can give you an estimated time. 01925 828009 


Some manufacturers request we do not sell Items online so these items are only available to collect from our store.

In Stock - Free Next Day Delivery*

Platinum Jubilee 2022 Bank Holiday Delivery Schedule


Ordered (pre-3pm) Expected Delivery Extra Information
Tuesday 31st May

Wednesday 1st June


Wednesday 1st June Saturday 4th or Sunday 5th June (if requested) If next day delivery is selected then delivery will be made on Tuesday 7th June.

Free next working day delivery when you spend over £75. We will send you a tracking number where DPD will give a one hour delivery window. Services available Monday to Friday (excluding public holidays) to most mainland UK addresses for in stock items ordered before our cut-off time at 3pm. Terms apply.

Free Saturday delivery when you spend over £500. We will send you a tracking number where DPD will give a one hour delivery window. Services available to most mainland UK addresses for in stock items ordered before our cut-off time on Friday 3pm. Terms apply.

* Excludes CLICK & COLLECT items  Some of our manufactures request for there items not to be sold on line for these items our delivery service may not be available in curtain locations so please call to order 01925 828009

Delivery Costs

Standard next day delivery is free for all orders to most UK mainland addresses. All other delivery prices are determined by the destination, the service chosen and the value and weight of your order. Addresses in the Scottish Highlands, offshore, Northern Ireland & Ireland may incur additional delivery costs, depending on the items ordered.

You may also like

Recently viewed