Reference Series
Hercules II / Monoblock Power Amplifier
REFERENCE ALTAIR II Line Stage ORION Phono Stage HERCULES II Mono Power Amplifier HERCULES II Stereo Power Amplifier
Hercules II / Monoblock Power Amplifier / Features

Hercules II Monoblock Power Amplifier
1,000 watts of power into 8 ohms
With 1 kilowatt of rated power into 8 ohms (and even that is a conservative number), the Hercules II monoblock has more than enough power for any speaker, any space and any listening taste. It handles low-impedance speakers with ease, delivering 1.5 kW into 4 ohms and an incredible 2 kW into 2 ohms.

Balanced drive design for superior musicality
By using only N-type output transistors, instead of half N-type and half P-type as in other amplifiers, Hercules II achieves an essentially perfect balance between the positive and halves of the audio signal. As in a single-ended amplifier, the entirety of the audio signal passes through exactly the same type of output device.

Modular circuit concept
By building Hercules II from numerous 125-watt single-ended modules, we achieve the sound quality of a small amplifier with a full 1,000 watts of power.

Dual 3,000-watt power transformers
These custom-wound toroidal transformers contain several isolated sets of windings to supply independent power feeds to various circuits within the amplifier. Because the windings are isolated, the demands of one circuit do not affect the performance of other circuits, and consistent voltage and current are always supplied.

No Zobel network needed
Hercules II’s inherently stable circuit design eliminates the need for a Zobel network at the output terminals to ensure stability at high frequencies.

Large heat sinks with high-flow ventilation ports
An amplifier of Hercules II’s incredible power must have ample and consistent airflow for reliable operation. To ensure that the amplifier runs cool, we equip it with huge heat sinks and hundreds of large ventilation ports that minimize airflow impedance.

Line Stage Gain Module
In order to assure that all incoming signals are perfectly balanced and can thus benefit from Hercules II’s balanced drive design, we gave it the same type of input stage we use on all of our line-level components. This fully complementary preamplifier circuit uses hand-selected FETs and servos to achieve an essentially perfect balance between the positive and negative halves of the signal.

Constellation Direct balanced interface
Because all Constellation Audio preamplifiers supply a perfectly balanced audio signal at their outputs, Hercules II includes the Constellation Direct input. This input bypasses the amplifier’s Line Gain Stage Module, thus simplifying the audio signal chain and achieving maximum musicality.

Reference Series Index
Altair II Line Stage
Orion Phono Stage
Hercules II Mono Power Amplifier
Overview
Features
Specifications
Hercules II Stereo Power Amplifier


Inspiration Series Index
Preamp 1.0 Line Stage
Stereo 1.0 Stereo Power Amplifier
Mono 1.0 Monoblock Power Amplifier


Performance Series Index
Argo Integrated Amplifier
Virgo III Line Stage
Cygnus Digital File Player/DAC
Perseus Phono Preamplifier
Centaur II Power Amplifier
Centaur Mono Monoblock Power Amplifier
Centaur Stereo Power Amplifier



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