The Ultimate Statement in Pure Class A Amplification | Available at Trimira Audio
The Gryphon Apex Stereo Power Amplifier is a statement-level reference amplifier engineered around Pure Class A operation, true dual-mono construction, enormous power-supply reserves, and exceptional current capability.
Designed without conventional compromises of size or weight, the Apex Stereo combines dual 2,000 VA toroidal transformers, more than 1 farad of power-supply capacitance, 64 high-current bipolar output devices, and a zero-global-negative-feedback signal architecture.
With specified output of 210 W per channel into 8 Ω, 420 W into 4 Ω, 800 W into 2 Ω, and 1,490 W into 1 Ω, the Apex Stereo is designed to maintain extraordinary authority into demanding loudspeaker loads.
At Trimira Audio, we recommend the Apex Stereo for uncompromising reference two-channel systems where current delivery, Class A operation, dynamic scale, and absolute system control are paramount.
Key Features & Technological Innovations
Pure Class A Dual-Mono Topology
The Apex Stereo uses a genuine dual-mono architecture within a single chassis.
The left and right channels have independent:
- Power supplies
- Rectification
- Voltage-amplification stages
- Output stages
This architecture is designed to maximise channel separation and minimise interaction between the two amplifier channels.
Zero Global Negative Feedback
The Apex Stereo operates with zero global negative feedback.
The amplifier's specified 0.3 Hz–330 kHz (-3 dB) bandwidth provides substantial frequency-response margin beyond the audible range.
1,040,000 µF Energy Reservoir
A massive 1,040,000 µF capacitor bank provides more than one farad of total power-supply storage.
This substantial energy reserve is designed to support the amplifier during large transient demands and high-current operation.
64 High-Current Bipolar Output Devices
The output stage incorporates 64 high-current bipolar transistors.
The devices operate in parallel to provide substantial current capability and enable the amplifier's increasing output as loudspeaker impedance falls.
Dual 2,000 VA Toroidal Transformers
Two custom 2,000 VA toroidal transformers provide dedicated power for the dual-mono architecture.
The transformers are housed in mechanically decoupled, magnetically shielded structures designed to reduce transformer vibration and unwanted electrical interaction with the amplifier circuitry.
Green Bias Control
The Apex Stereo incorporates Gryphon's Green Bias system, providing automated linking with compatible Gryphon preamplifiers alongside selectable manual bias modes.
The system provides Low, Mid, and High bias settings to manage Class A operating conditions, thermal output, and power consumption.
Technical Specifications
| Specification |
Gryphon Apex Stereo Power Amplifier |
| Topology |
Pure Class A Dual-Mono Power Amplifier |
| Power Output |
2 × 210 W @ 8 Ω |
| Power Output |
2 × 420 W @ 4 Ω |
| Power Output |
2 × 800 W @ 2 Ω |
| Power Output |
2 × 1490 W @ 1 Ω |
| Global Negative Feedback |
0 dB |
| Frequency Response (-3 dB) |
0.3 Hz–330 kHz |
| Gain |
+31.0 dB |
| Signal-to-Noise Ratio |
< −86 dBV, A-weighted |
| THD + N |
<0.02% @ 50 W / 8 Ω |
| Input Impedance |
20 kΩ Balanced |
| Output Impedance |
0.015 Ω |
| Capacitor Storage Bank |
1,040,000 µF Total |
| Output Devices |
64 High-Current Bipolar Transistors |
| Power Transformers |
2 × 2,000 VA Custom Toroidal Transformers |
| Inputs |
True Balanced Gold-Plated Neutrik XLR |
| AC Power Inlets |
2 × Power-Cord Sockets with C19 Receptacles |
| Dimensions (W × H × D) |
593 × 371 × 886 mm |
| Net Weight |
202.0 kg |
High-Current Loudspeaker Matching
The Apex Stereo's output capability increases dramatically as loudspeaker impedance decreases:
| Load |
Output per Channel |
| 8 Ω |
210 W |
| 4 Ω |
420 W |
| 2 Ω |
800 W |
| 1 Ω |
1490 W |
This makes the amplifier particularly suited to demanding reference loudspeakers with low-impedance regions.
When selecting a loudspeaker partner, Trimira Audio can assess:
- Sensitivity
- Minimum impedance
- Phase angle
- Room size
- Desired listening levels
- Current requirements
- Overall system gain structure
Reference Two-Channel System Architecture
The Apex Stereo provides the performance benefits of dual-mono construction while retaining a single amplifier chassis.
A typical reference system can be configured as:
Source → Reference Preamplifier → Gryphon Apex Stereo → Reference Loudspeakers
The balanced XLR input provides a direct interface with compatible high-end preamplification.
Class A Installation & Thermal Management
At 202 kg, the Apex Stereo requires serious installation planning.
Pure Class A operation also generates considerable heat, particularly when operated at higher bias settings.
The installation should provide:
- A highly robust equipment platform
- Adequate ventilation
- Sufficient clearance
- Appropriate mains infrastructure
- Safe delivery and positioning access
Trimira Audio can advise on equipment support, thermal management, dedicated power requirements, and system placement.
Consult with the High-End Audio Specialists at Trimira Audio
The Gryphon Apex Stereo combines Pure Class A operation, zero global negative feedback, true dual-mono architecture, dual 2,000 VA transformers, 1,040,000 µF of energy storage, 64 high-current bipolar output devices, and 1-ohm load capability in a 202 kg statement amplifier.
Trimira Audio can assist with complete Apex system planning, including reference loudspeaker matching, dedicated power infrastructure, thermal management, equipment placement, and system calibration.
Contact the Trimira Audio reference amplification specialists in Brisbane to arrange a private Apex audition or discuss a complete statement-level two-channel system.
