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Constellation Audio Hercules 11 Mono Power Amplifier

hercules11mono
When one of America’s best-known audio reviewers described our original Hercules amplifier, along with our Altair preamp, as “the most transparent, detailed, and cleanest electronics I’ve heard,” we knew our “dream team” of top audio engineers and industrial designers had achieved its go ...Read more

When one of America’s best-known audio reviewers described our original Hercules amplifier, along with our Altair preamp, as “the most transparent, detailed, and cleanest electronics I’ve heard,” we knew our “dream team” of top audio engineers and industrial designers had achieved its goal: to create the world’s best amplifier.

Manufacturer Site Link: Constellation Audio Hercules 11 Mono

Brand: Constellation AudioConstellation Audio Call 01483 537577 for Price


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The Hercules II Mono employs a revolutionary twist on the concept of a fully balanced amplifier. In all balanced amplifiers, mirror-imaged amplifier circuits are used, with one part amplifying the positive half of an audio signal, and the other part amplifying the negative half. Yet in other balanced amps, the two halves are not quite equal, because one uses N-type transistors and the other uses P-type transistors. Hercules II achieves an essentially perfect balance by combining two matched single-ended amplifiers using only N-type output transistors. Every element of the musical signal passes through exactly the same types of circuit components, maintaining all the musicality of the original single-ended module.Of course, if the incoming audio signal is not perfectly balanced, it does little good for the amplifier to be perfectly balanced. To ensure a pristine incoming signal, we equip Hercules II Mono with our Line Stage Gain Module, the same circuit used in our Altair II line stage.

Our Constellation Direct interface allows this gain stage to be bypassed if a Constellation Audio preamp is used. As with its predecessor, the performance of the Hercules II Mono is not affected by the speaker, nor by the program material, nor by the listening volume. It delivers the same musical intimacy and emotion with any speaker, with any music, at any volume. 

Brand URL : https://www.constellationaudio.com

Inputs/;    4 XLR (2 Constellation Direct), 2 RCA

Power output, 8Ω (1 kHz @ 1% THD+N)                        550 W

Power output, 4Ω (1 kHz @ 1% THD+N)                        750 W

Power output, 2Ω (1 kHz @ 1% THD+N)                        1 kW

Outputs    metal binding posts

Frequency response     10 Hz to 100 kHz, +1/-0.5 dB

THD+N (1 kHz @ rated power)   0.05%

Output impedance 0.05Ω

Damping factor (8Ω load)  150

Input impedance  10KΩ unbalanced, 20KΩ balanced

Output noise    500 µV, -100 dB @ 250 watts

Weight   220 lbs / 100 kg

Dimensions    13" / 330.2mm x 19" / 482.6mm x 32" / 812.8mm (hwd)