The Gryphon Apex Stereo is Gryphon Audio Designs’ flagship pure Class A stereo power amplifier, engineered without conventional restrictions on size, weight or cost. Designed and manufactured in Denmark, its pure dual-mono architecture combines balanced dual-differential Class A input circuitry, an ultra-fast symmetrical Class A voltage amplification stage and zero global negative feedback to deliver exceptional transparency, dynamic authority and control.
Sixty-four very high-current bipolar output transistors, an enormous 1,040,000µF capacitor bank and two bespoke 2,000VA toroidal transformers provide extraordinary energy reserves, allowing the Apex Stereo to deliver 210W per channel into 8 ohms, 420W into 4 ohms, 800W into 2 ohms and 1,490W into 1 ohm. Fully regulated low-noise supplies for the voltage amplification stages, extensive constrained-layer chassis damping and Gryphon silver internal wiring complete an uncompromising amplifier designed to maintain refinement and musical resolution while controlling virtually any loudspeaker load.
Key Features
Flagship pure Class A stereo power amplifier
Designed and manufactured in Denmark
Pure dual-mono configuration
Zero global negative feedback
64 very high-current bipolar output transistors
1,040,000µF capacitor bank
2 × bespoke 2,000VA toroidal transformers
Extremely low-capacitance Class A J-FET input buffer
Balanced dual-differential Class A input circuitry
Ultra-fast symmetrical Class A voltage amplification stage
Fully regulated low-noise power supply for voltage amplification stages
DC servo coupling
Frequency-independent damping factor
Premium massive zinc-foil capacitors for local power-supply decoupling
Four-layer PCBs with up to 105µm copper
Gryphon silver internal signal and power wiring
Individually decoupled transformer castings
True balanced gold-plated Neutrik XLR inputs
Gryphon custom gold-plated loudspeaker binding posts
Automatic Gryphon Green Bias control
Manual Low/Mid/High bias settings
Non-intrusive protection system
Firmware upgradeable via USB
2 × 210W into 8Ω
2 × 420W into 4Ω
2 × 800W into 2Ω
2 × 1,490W into 1Ω
THD+N: <0.02% at 50W into 8Ω
Output impedance: 0.015Ω
Bandwidth: 0.3Hz–330kHz (-3dB)
Gain: 31dB
Balanced input impedance: 20kΩ
Maximum power consumption: 3,700W
High-bias idle consumption: 1,000W
Dimensions: 593 × 371 × 886mm
Weight: 202kg
The Gryphon Apex Stereo is Gryphon Audio Designs’ flagship pure Class A stereo power amplifier, engineered without conventional restrictions on size, weight or cost. Designed and manufactured in Denmark, its pure dual-mono architecture combines balanced dual-differential Class A input circuitry, an ultra-fast symmetrical Class A voltage amplification stage and zero global negative feedback to deliver exceptional transparency, dynamic authority and control.
Sixty-four very high-current bipolar output transistors, an enormous 1,040,000µF capacitor bank and two bespoke 2,000VA toroidal transformers provide extraordinary energy reserves, allowing the Apex Stereo to deliver 210W per channel into 8 ohms, 420W into 4 ohms, 800W into 2 ohms and 1,490W into 1 ohm. Fully regulated low-noise supplies for the voltage amplification stages, extensive constrained-layer chassis damping and Gryphon silver internal wiring complete an uncompromising amplifier designed to maintain refinement and musical resolution while controlling virtually any loudspeaker load.
Key Features
Flagship pure Class A stereo power amplifier
Designed and manufactured in Denmark
Pure dual-mono configuration
Zero global negative feedback
64 very high-current bipolar output transistors
1,040,000µF capacitor bank
2 × bespoke 2,000VA toroidal transformers
Extremely low-capacitance Class A J-FET input buffer
Balanced dual-differential Class A input circuitry
Ultra-fast symmetrical Class A voltage amplification stage
Fully regulated low-noise power supply for voltage amplification stages
DC servo coupling
Frequency-independent damping factor
Premium massive zinc-foil capacitors for local power-supply decoupling
Four-layer PCBs with up to 105µm copper
Gryphon silver internal signal and power wiring
Individually decoupled transformer castings
True balanced gold-plated Neutrik XLR inputs
Gryphon custom gold-plated loudspeaker binding posts
Automatic Gryphon Green Bias control
Manual Low/Mid/High bias settings
Non-intrusive protection system
Firmware upgradeable via USB
2 × 210W into 8Ω
2 × 420W into 4Ω
2 × 800W into 2Ω
2 × 1,490W into 1Ω
THD+N: <0.02% at 50W into 8Ω
Output impedance: 0.015Ω
Bandwidth: 0.3Hz–330kHz (-3dB)
Gain: 31dB
Balanced input impedance: 20kΩ
Maximum power consumption: 3,700W
High-bias idle consumption: 1,000W
Dimensions: 593 × 371 × 886mm
Weight: 202kg
