Gryphon Essence Stereo Power Amplifier
Description
Overview
Essence is your direct music conduit with sonic neutrality, textural purity and dynamic ease, defined as much by what we have left out as by what we have put in.
With an ultra-wide frequency bandwidth (0.5 Hz – 350 kHz, +0 dB, -3 dB), Gryphon Essence is conservatively rated at 50W (8Ω), 100W (4Ω), 200W (2Ω) in stereo, Class A and at 55W (8Ω), 110W (4Ω), 220W (2Ω), (Monoblock), Class A.
These exceptional figures guarantee stability with any loudspeaker load. The dual mono design employs a custom-built shielded, high current toroidal transformer with dual windings for left and right channel. The output stage and driver stage employ separate power supplies for effective isolation of the output stage from the input stage. A separate transformer for control and display circuitry isolates them from the signal path.
The Drive
Now, Gryphon Essence takes us closer in the never-ending quest for a more natural and convincing musical illusion. Years of experimentation and extensive research in the fields of circuit topology and component quality and reliability have resulted in the development of an amplifier that impresses immediately with its ability to cruise effortlessly through even the most demanding musical passages, regardless of volume level. As a result of the constant high power reserves available at all times, the Essence simply does not “see” the speaker, so its reactive load cannot degrade amplifier performance. Unlike other high-power amplifiers, Gryphon’s no-compromise, pure Class A topology allows the Essence to offer extreme power reserves on demand, combined with refinement and delicacy in musical presentation.
It is our fundamental philosophy that all electronics in the playback chain must ideally be neutral and not add or subtract anything from the recording, no matter how “attractive” such distortions may be. The Essence is by nature a product for the fortunate few who can afford such a statement, just as it is a product for the increasing number of audiophiles who seek purity in the reproduction of music, a product for music lovers who respect both the musicians and recording engineers enough to refrain from adding or subtracting anything in relation to the original intention of the recording.
Circuit topology
Power is the name of the game and the Essence is equipped to take on even the most vicious and nightmarish of loudspeaker loads. The output section uses Sanken bipolar output devices which have demonstrated extreme reliability in addition to outstanding sonic performance. The Essence Stereo employs 10 transistors per channel, while the Essence Monoblock features 20 of these devices per unit. These transistors can be called upon to deliver massive amounts of momentary peak power without overload.
Fully symmetrical input- and gain stages improves transient response, soundstage depth and ambience retrieval.
The separate driver section has its own power supply from individual windings on the custom-made toroidal transformers. Unique mechanical design ensures optimal thermal tracking between drivers and output devices. The driver section features its own generous bank of high quality capacitors.
The power capacitor bank in the Stereo version is an astounding 440,000 µF array of exceptional capacitors, and 880,000 µF in the Monoblock edition, in both versions bypassed by high quality polypropylene capacitors throughout the power supplies.
Global negative feedback is non-existent and DC coupling employs DC servo circuitry. Internal wiring in the signal path is kept to an absolute minimum.
Gryphon Essence utilizes a completely independent power supply for display and control circuits, effectively preventing digital noise generated by these circuits from reaching the amplifier circuits.
Protection
The unique, non-invasive protection system offers reliable, fuss-free protection without compromising signal purity and signal path simplicity.
The output signal is constantly compared to the input, so that, in the presence of a difference which exceeds predetermined limits, the amplifier mutes and enters standby mode until the error condition has been corrected.
Heatsink temperature is constantly monitored. In the event of overheating (temperature in excess of 90° C), the amplifier will shut down. Normal operation will resume when a safe operating temperature is reached.
Features:
- Exterior design by Flemming E. Rasmussen
- Electronics design by Tom Møller
- Pure Dual Mono configuration
- Zero global negative feedback
- 440.000μF capacitor bank
- Four-layer up to 70 μm copper printed circuit boards
- Custom-made 1350 VA toroidal transformer
- DC servo coupling
- Separate power supply for digital and analog circuits
- Frequency-independent damping factor
- Gryphon silver internal signal and power wiring
- Fully balanced input and Voltage Amplifier Stage (VAS)
- Military spec. double-sided printed circuit boards
- Optimal circuit layout for shortest possible signal path
- 20 very high current bipolar output transistors
- RGB LED bar indicating Bias High / Low status
- True balanced inputs with gold-plated Neutrik XLR input sockets
- Soft start turn-on prevents triggering of fuses or circuit breakers in the home electrical system
- Gryphon gold-plated custom-built binding posts
- 12V Link for remote power on and off
- Automatic Green Bias setting via Green Bias control link or manual Low/Mid/High bias
- Microprocessor-controlled non-invasive “smart” protection system
- Separate power supply for display and control circuits
- Designed and manufactured in Denmark
Specifications:
| Power Output | 2 x 50W @ 8Ω, 2 x 200W @ 2Ω at 115V/230Vac |
| Noise (Unweighted, 20-20kHz) | < -78dBV |
| Noise (A-weighted) | < -81dBV |
| THD+N | < 1%, 50W @ 8Ω |
| IMD (DFD) | < 0.05%, 25W @ 8Ω |
| Output Impedance | 0.015Ω |
| Bandwidth (-3dB) | 0.3Hz to 350kHz |
| Gain | +31.0dB |
| Input Level | 0.564Vrms |
| Input Impedance (Balanced, 20-20kHz) | 20kΩ |
| Power Consumption (Maximum) | 1350W |
| Power Consumption (Idle, Bias H) | 350W |
| Power Consumption (Standby) | < 0.5W |
| AC Inlets | 1 socket for power cords with C19 receptacle |
| Dimensions (WxHxD) | 47 x 24 x 46 cm, 45kg net |
| Shipping Dimensions | 59 x 57 x 38 cm, 57kg |