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Constellation Audio Reference Series - Hercules II Mono


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Constellation Audio Reference Series - Hercules II Mono
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.

Specifications:-
Inputs 2 XLR (1 Constellation Direct), 1 RCA
Power output, 8Ω (1 kHz @ 1% THD+N) 1.1 kW
Power output, 4Ω (1 kHz @ 1% THD+N) 1.5 kW
Power output, 2Ω (1 kHz @ 1% THD+N) 2 kW
Outputs metal binding posts
Frequency response 10 Hz to 100 kHz, +1/-0.5 dB
Gain 32 dB
THD+N (1 kHz @ rated power) Less than 0.05%
Output impedance 0.05Ω
Damping factor (8Ω load) 150
Input impedance 10KΩ unbalanced, 20KΩ balanced
Output noise Less than 500 µV, -100 dB @ 250 watts
Weight 220 lbs/100 kg
Dimensions 13" / 330.2mm x 19" / 482.6mm x 32" / 812.8mm (hwd)

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