Pure Class A Dual-Mono Power Amplifier | Trimira Audio Specialist
The Gryphon Essence Stereo is a high-performance stereo power amplifier from Gryphon Audio Designs, engineered around a pure Class A, dual-mono architecture.
With zero global negative feedback, a substantial 1350 VA toroidal transformer, a 440,000 µF power-supply reservoir, and a high-current bipolar output stage, the Essence Stereo is designed to combine refined low-level resolution with substantial control over demanding loudspeaker loads.
At Trimira Audio, we recommend the Gryphon Essence Stereo for listeners seeking a sophisticated high-end power amplifier with pure Class A operation, wide bandwidth, and substantial current capability.
Key Features & Audio Engineering Highlights
Pure Class A & Zero Global Negative Feedback
The Essence Stereo operates in pure Class A, eliminating the conventional crossover region associated with Class AB output stages.
Its zero global negative feedback architecture is designed to preserve the amplifier's inherent transient behaviour and minimise the phase effects associated with large feedback loops.
Green Bias Control System
Gryphon's Green Bias system allows the amplifier's Class A operating bias to be adjusted according to system requirements.
The bias can be configured for lower or higher operating levels, allowing users to balance Class A operating range, heat generation, and power consumption.
True Dual-Mono Power Supply
The Essence Stereo uses a shielded 1350 VA custom toroidal transformer with independent windings for the two channels.
A substantial 440,000 µF total capacitor reservoir provides energy storage for the amplifier's output stages.
The dual-mono architecture helps maintain channel independence and stable power delivery.
High-Current Bipolar Output Stage
The output stage employs 20 high-current Sanken bipolar transistors, with 10 devices assigned to each channel.
The substantial output stage is designed to provide high instantaneous current capability when driving demanding loudspeaker loads.
DC-Coupled Signal Path & Wide Bandwidth
The amplifier uses a DC-coupled signal path supported by DC-servo circuitry.
The specified 0.3 Hz–350 kHz (-3 dB) bandwidth provides considerable margin beyond the audible frequency range.
Microprocessor-Based Protection
Operating conditions are continuously monitored for parameters including:
- Temperature
- DC offset
- Short circuits
The protection architecture is designed to safeguard the amplifier and connected loudspeakers without placing conventional protection components directly in the main signal path.
Product Specifications
| Specification |
Technical Detail |
| Amplifier Design |
Pure Class A Dual-Mono Power Amplifier |
| Global Negative Feedback |
0 dB |
| Output Power |
2 × 50 W @ 8 Ω; 2 × 100 W @ 4 Ω; 2 × 200 W @ 2 Ω |
| Power Supply Capacity |
440,000 µF Total Reservoir |
| Power Transformer |
Custom 1350 VA Shielded Toroidal Transformer |
| Frequency Bandwidth (-3 dB) |
0.3 Hz–350 kHz |
| Gain |
+31.0 dB |
| Input Impedance |
20 kΩ Balanced |
| Output Impedance |
0.015 Ω |
| Signal Input |
1 × Pair Gold-Plated Neutrik XLR Balanced Inputs |
| Loudspeaker Outputs |
Gold-Plated Heavy-Duty Binding Posts |
| Standby Power Consumption |
<0.5 W |
| Idle Power Consumption, High Bias |
350 W |
| Maximum Power Consumption |
1350 W |
| Dimensions (W × H × D) |
470 × 240 × 460 mm |
| Net Weight |
45.0 kg |
Amplifier & Loudspeaker Matching
Although the Essence Stereo is rated at 50 W per channel into 8 ohms, its Class A output stage is designed to increase power as impedance falls:
- 50 W @ 8 Ω
- 100 W @ 4 Ω
- 200 W @ 2 Ω
This makes current delivery an important part of system matching.
The amplifier can be particularly attractive for high-quality loudspeakers that benefit from strong control and refined Class A amplification.
Trimira Audio can assist with evaluating:
- Loudspeaker sensitivity
- Impedance characteristics
- Required listening levels
- Current demand
- Preamp compatibility
- Balanced XLR connectivity
- Overall system gain structure
Class A Thermal Management
Pure Class A operation generates significant heat, particularly at higher bias settings.
For optimal operation, the Essence Stereo should be installed with appropriate ventilation and adequate clearance around the chassis.
Trimira Audio can advise on:
- Equipment-rack placement
- Ventilation
- Dedicated AC requirements
- Green Bias configuration
- Long-term thermal management
Why Choose Trimira Audio for Your Gryphon Reference System?
Trimira Audio Showroom Experience
Visit the Trimira Audio showroom to audition the Gryphon Essence Stereo with suitable Gryphon preamplification and high-end loudspeakers.
Class A System Consultation
Our specialists can help configure the amplifier's operating environment, including thermal management, AC power considerations, Green Bias settings, and loudspeaker matching.
Australian Support
Trimira Audio provides specialist support for high-end Danish audio systems throughout Queensland and Australia, including local warranty assistance and carefully managed freight.
What's Included in the Box?
- 1 × Gryphon Essence Stereo Class A Power Amplifier
- 1 × 20 A High-Current AC Power Cable
- 1 × 12 V DC Link Control Cable
- User Manual
- Official Gryphon Audio Documentation
The Gryphon Essence Stereo combines pure Class A operation, zero global negative feedback, dual-mono power architecture, 1350 VA transformer capacity, 440,000 µF energy storage, and high-current bipolar output stages in a substantial 45 kg stereo power amplifier.
