Ultra-High-End Reference Class A Amplifier | Trimira Audio Specialist
The Gryphon Audio Hyperion is a reference-level dual-mono pure Class A stereo power amplifier designed for demanding high-end loudspeaker systems. Handcrafted in Denmark, the Hyperion combines Gryphon’s high-current amplification architecture with zero global negative feedback and a fully balanced signal path.
Its dual-mono power supply uses two 1,500 VA toroidal transformers, while the output stage employs 40 high-current bipolar transistors per chassis and a 500,000 µF filter reservoir. The amplifier delivers 180 W per channel into 8 Ω, 360 W into 4 Ω, and 720 W into 2 Ω.
Gryphon’s Green Bias control provides selectable Low, Mid, and High operating states, with automatic bias control available through a compatible Green Bias link. The Hyperion is designed for systems where substantial current delivery, low output impedance, and uncompromised Class A operation are priorities.
Key Features & Acoustic Engineering Highlights
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Pure Class A Zero-Feedback Circuitry: Continuous output-stage biasing and zero global negative feedback are designed for consistent linear operation.
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High-Current Output Stage: 40 high-current bipolar output devices per chassis provide substantial current capability for demanding loudspeaker loads.
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500,000 µF Power Supply Reservoir: Large-capacity filtering provides substantial energy storage for high dynamic demands.
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Dual 1,500 VA Toroidal Transformers: Dedicated transformers support the amplifier's dual-mono architecture and power delivery.
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Green Bias Control: Manual Low/Mid/High bias selection or automatic control via a compatible Gryphon Green Bias connection.
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Low-Noise Input Stage: J-FET and BJT input architecture provides a low-noise front end for high-resolution signal amplification.
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Low Output Impedance: 0.025 Ω output impedance provides strong electrical control over connected loudspeakers.
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Dual C19 AC Power Inputs: Two high-current IEC C19 connections provide dedicated mains connections for the dual-mono architecture.
Product Specifications
| Specification |
Technical Detail |
| Amplifier Design |
Pure Class A Dual-Mono Stereo Power Amplifier |
| Output Power (RMS) |
2 × 180 W @ 8 Ω / 2 × 360 W @ 4 Ω / 2 × 720 W @ 2 Ω (115V/230V AC) |
| Circuit Topology |
Zero Global Negative Feedback, Fully DC Servo-Coupled |
| Output Devices |
40 High-Current Bipolar Transistors per Chassis |
| Transformers |
2 × 1,500 VA Custom Toroidal Transformers in Decoupled Castings |
| Power Capacitance |
500,000 µF Filter Reservoir |
| Frequency Response |
0.3 Hz – 330,000 Hz (-3 dB) |
| Signal-to-Noise Ratio |
< -80 dBV (Unweighted 20 Hz–20 kHz); < -83 dBV (A-weighted) |
| Output Impedance |
0.025 Ω |
| Gain |
+31.0 dB |
| Input Sensitivity / Impedance |
1.07 Vrms / 20 kΩ Balanced (20 Hz–20 kHz) |
| Internal Wiring |
Solid-Core Gryphon Pure Silver Wiring |
| Input Terminals |
Gold-Plated Neutrik Balanced XLR Sockets |
| Speaker Terminals |
Proprietary Gold-Plated Custom Gryphon Binding Posts (Spade/Banana/Bare) |
| Bias Control |
Manual Low/Mid/High or Auto Green Bias Link |
| Idle Power Consumption |
Bias Low: 206 W / Bias Mid: 470 W / Bias High: 715 W |
| Standby Power |
<0.5 W |
| AC Power Connection |
2 × High-Current IEC C19 Power Receptacles |
| Dimensions (W × H × D) |
59.4 cm × 33.0 cm × 65.4 cm (23.3" × 13.0" × 25.7") |
| Net Weight |
126 kg (277.7 lbs) per chassis |
| Cabinet Finish |
Satin Black Anodized Machined Aluminium with High-Gloss Acrylic Accents |
| Origin & Warranty |
Designed & Handcrafted in Denmark |
Why Choose Trimira Audio for Your Gryphon Equipment?
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Trimira Audio Reference Auditions: Experience Gryphon Audio Designs amplification alongside reference loudspeakers and complementary source electronics.
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White-Glove System Installation & Integration: Our specialists can assist with amplifier placement, dedicated power requirements, balanced signal routing, thermal considerations, and system integration.
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Australian Support: Trimira Audio supplies genuine Gryphon Audio products throughout Queensland and Australia with official local warranty support and specialised insured freight.
What's Included in the Box?
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1 × Gryphon Audio Hyperion Pure Class A Stereo Power Amplifier Chassis
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2 × High-Current C19 IEC Power Cords
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1 × 12V Green Bias Link Control Cable
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1 × USB Firmware Update Drive
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White-Glove Heavy-Duty Transport Crate & Gryphon Owner Documentation
