Centaur Mono



True, fully balanced performance.

For those who demand a musical presentation free of concerns about dynamics and distortion, yet with all the delicacy and detail that a single-ended tube amp delivers, we present the Centaur Mono. The Centaur Mono incorporates all of Constellation Audio’s groundbreaking amplifier technologies in a package that is, shall we say, a bit more living-room-friendly than our 275-pound-each Hercules monoblock.

Along with the Hercules and the Centaur stereo amplifier, the Centaur Mono is one of the few amplifiers in the world that deliver true, fully balanced performance. Almost all amplifiers use N-type transistors for the positive half of the audio signal, and P-type transistors for the negative half of the signal. Thus, the two halves of the signal are not perfectly matched.

Incredible power and incomparable finesse.

Each Centaur Mono delivers 500 watts per channel continuous power into 8 ohms. This is sufficient to drive any speaker ever made to maximum performance with power left to spare. When you own the Centaur Mono, there can be no doubt that your amplifier is delivering all the dynamics in whatever music you choose to play. Such extraordinary power also essentially eliminates concerns about amplifier distortion.

The Centaur Mono delivers everything an audiophile could want: incredible power and incomparable finesse, in a chassis compact enough for easy installation in most listening rooms.

500 watts per channel into 8 ohms

The Centaur Mono owner need never worry about power, no matter what speakers are used. The power output is sufficient to drive any speaker, of any impedance or sensitivity, with enough headroom to practically eliminate the possibility of audible distortion from the amplifier.

Unique modular design

The Centaur Mono gets its power not from bulking up a smaller design as most big amplifiers do, but by combining multiple 125-watt modules. Thus, it delivers the musicality of a small amp with no concerns about dynamics or distortion.

Exclusive balanced bridged circuit design

By using only N-type output transistors, instead of half N-type and half P-type as almost all other amplifiers do, the Centaur Mono achieves practically perfect balance between the positive- and negative-going halves of the audio signal.

Fully discrete circuitry

To assure maximum performance, we use no ICs in the Centaur Mono’s audio circuits, only discrete transistors.

Custom-wound toroidal transformer

The Centaur Mono’s more-than-ample power supply assures lifelike dynamics. The core of the supply is a custom-wound, 1,600-watt toroidal power transformer, which allows the amp to deliver exceptional headroom while minimizing production of stray magnetic fields.

Stable design with no output filters

Because we designed the Centaur Mono’s output to be inherently stable, the amp does not require a Zobel filter network at its output as many high-powered amps do.

Maximum ventilation for maximum reliability

The Centaur Mono’s extreme output capability demands careful thermal control, which we achieve through extra-large heat sinks and hundreds of large ventilation ports.

Line Stage Gain Module

The Centaur Mono’s input stage employs the same Line Stage Gain Module circuit used throughout our line. This fully complementary topology uses servo circuits and hand-selected, ultra-low-noise FETs to assure that all incoming signals are perfectly balanced. This is important when preamps of other brands are used.

Constellation Direct balanced interface

The Constellation Direct interface bypasses the Centaur Mono’s input stage, thus reducing the number of gain stages in the system and achieving superior sound quality. It is designed for use only with our Altair and Virgo preamps, which output a perfectly balanced signal because they use our Line Stage Gain Module.

1 Constellation Direct XLR, 1 standard balanced XLR, 1 unbalanced RCA
dual metal binding posts
Power output:
500 watts, 8 ohm (1 kHz @ 1% THD+N)
800 watts, 4 ohm (1 kHz @ 1% THD+N)
1000 watts, 2 ohm (1 kHz @ 1% THD+N)
14dB (Constellation Direct)/26 dB Balanced & RCA
Output noise:
<70 ?V, 500 kHz BW, -116 dB @ 250 watts
Damping factor (8Ω load):
<0.05%, 1 kHz @ up to 90% of rated power
Frequency response:
10 Hz to 100 kHz, +1/-0.5 dB
Input impedance (balanced):
20 K? Constellation Direct, 20 K? XLR
Input impedance (single-ended):
Output impedance:
0.1 ohm
103 lbs / 46.7 kg
Dimensions (W x H x D):
17 x 11 x 20 in (whd)
43.2 x 28 x 50.8 cm (whd)

The Absolute Sound

The Absolute
Sound - Editor's
Choice 2016

Inspiration STEREO 1.0, Inspiration MONO 1.0, Inspiration PREAMP 1.0, Centaur Stereo, Argo, Perseus, Virgo III, Altair II, Hercules II Mono have been awarded the Absolute Sound 2015 Editor’s Choice award.

The Absolute Sound

Editor's Choice

Virgo II, Perseus, Centaur Stereo & Mono and the Inspiration Series STEREO 1.0, MONO 1.0 and PREAMP 1.0 have been awarded the Absolute Sound 2015 Editor’s Choice award.

The Absolute Sound

Absolute Sound
2013 Editor's

Virgo, Perseus and Centaur Stereo have been awarded the Absolute Sound 2013 Editor’s Choice award

The Absolute Sound

The Absolute
Sound 2012
Golden Ear

Centaur, Perseus and Virgo have been awarded the Absolute Sound 2012 Golden Ear Award