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Building on the successful introduction of the Centaur II stereo and mono amplifiers last year, and benefitting from the research and development used to create the Reference Series Hercules II amplifiers, this new amplifier satisfies the demand for a more powerful Performance Series amplifier. Products of the Constellation Audio “dream team,” the Centaur II 500 Stereo delivers outs...[more]

The Citadel is a monaural power amplifier offering all the advantages of the knowledge, the research and dedication that Team theta brought to the Dreadnaught-and then some. Citadel has been created to power the most demanding two channel musical reproduction systems, as well as delivering abundant power to home theater systems, to effortlessly recreate the vast spectran of sound tracks....[more]

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 use...[more]

Every major section of the amplifier - power supply, input, driver, and output stages - have all been enhanced in this advancement. A new transformer winding pattern provides over 50% more current output from the same transformer footprint. This additional current offers greater headroom during dynamic passages. A reinvisioned input stage combines a brand new circuit topology with advanced comp...[more]

This is power enough to produce incredible, concert-hall dynamics with any speaker. Yet it is the size of a standard audio amplifier and weighs just 55 pounds. When you consider that the Centaur Monoblock weighs in at 103 pounds, and the Hercules II Monoblock at 220 pounds, the Inspiration's ability to deliver incredible power from a modestly sized chassis is remarkable indeed. Also remarka...[more]

With the final darTZeel NHB-458, it sets a new standard: after nine years of constant research and continuous development, this amplifier, not only it owns all the qualities of the NHB-108, already acclaimed by the whole audiophile world, but it goes further in revealing a very special machine in every respect. Some key features -The output is still higher than that already showed off the proto...[more]

The most powerful amplifiers ever developed by darTZeel. NHB-468 monoblocks are the most powerful amplifiers ever designed and built by darTZeel. They are the culmination of nine years' research and development. NHB-468 mono amplifiers retain all the musicality of the original signal. The NHB-468's immense power supply ensures that they can cover the full dynamic range, providing e...[more]

A new power device provides the foundation for an upgraded output stage. This new transistor, first used in the Relentless Mono Amplifier, extends high frequency response, increases power handling by a factor of four and features tighter tolerance gain matching between complementary NPN/PNP pairs. A wider safe operating area and superior gain linearity provides greater thermal stability through...[more]

Relentless Monoblock Amplifier Dan D’Agostino has always had a relentless desire to better his own creations, no matter how flawless they may seem. The Relentless Monoblock amplifier is the latest manifestation of that passion, the result of Dan’s desire for an amplifier that maintains its harmonic integrity and expansive soundstage from 0 watts to 1,500 watts. An amplifier so pow...[more]

Every major section of the Relentless Epic Mono Amplifiers- power supply, input, driver, and output stages - have all been enhanced in this advancement.  A new power management topology further isolates the power supply from the entirety of the audio circuitry providing extra protection from the noise the massive power transformers can generate. The Relentless Epic and Epic 800 employ ...[more]

Perfect Balance and Absolute Fidelity Crucial to the new circuit are the bipolar transistors powering the front end of the amplifier.  Activating the driver stage is a new bias stability circuit providing a nearly 50% increase in operating bias. Increasing Class A operation directly correlates to better sound quality. With this new circuit topology and the unique Copper/Aluminum heatsi...[more]

With its 5.5-kilowatt power supply feeding nearly 100 output devices, the Relentless Mono  Amplifier easily delivers 1,500 watts into 8 ohms—and when connected to a 220-volt or greater AC mains outlet, it doubles its output to 3,000 watts into 4 ohms and 6,000 watts into 2 ohms.  This power output is maintained with the same musical composure at full power as it is at 1 watt. ...[more]

All signal gain is realized in the current domain using discrete, proprietary, multiple-output current mirrors with extraordinary open loop linearity. There are no generic integrated circuits or op amps used anywhere. Current mirrors in the final gain stages use a new output power device that operates at a 73% higher voltage, delivers almost 10% more current, and offers 120 watts of additional ...[more]

Circuitry Highlights Patent pending Krell iBias Class A technology allows our latest amplifiers to run in full Class A mode to full power while minimizing heat generation. All signal gain is realized in the current domain using discrete, proprietary, multiple-output current mirrors with extraordinary open loop linearity. There are no generic integrated circuits or op amps used anywhere. Current mi...[more]

Constellation Audio, the renowned luxury goods manufacturer of high performance solid-state electronics, is pleased to announce the introduction of the new Revelation Series of components at CES 2017. CEO Dr. Murali Murugasu challenged his dream team of designers and engineers to develop a new series of Constellation Audio components that could deliver the essence of our renowned Performance Se...[more]

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 de...[more]

There are several reasons to choose the DS450M over its stereo counterpart. The most important is performance-based: a monaural amp simply produces a bigger, more spacious stage by virtue of the channels being totally isolated. Also, we were able to fit a much larger , power supply in the chassis. Then there is the issue of size: the DS450M is smaller and easier to situate than the hefty DS450 ste...[more]

All Evolution Series components are available in diamond-cut silver and a luxurious black finish.The new Evolution amplifiers enjoy the hereditary advantage, from faceplate to binding posts, first born in the Evolution One amplifier. Realized in monaural, stereo, and three channel configurations, the Evolution amplifiers bring the engaging reproduction of music and movie soundtracks debuted in ...[more]

Outputting a daunting 600 watts of power and coupled to Krell Evolution e Series circuit technology, the Evolution 600e is a velvet hammer. Power Supply   The Evolution 600e is equipped 2 2,200 VA transformers and 108,000 µF. This power source is the backbone for the output of the Evolution 600e. With this foundation, the Evolution 600e delivers 600 watts into 8 Ohms, 1,200 watts into 4...[more]

All Evolution Series components are available in diamond-cut silver and a luxurious black finish.The new Evolution amplifiers enjoy the hereditary advantage, from faceplate to binding posts, first born in the Evolution One amplifier. Realized in monaural, stereo, and three channel configurations, the Evolution amplifiers bring the engaging reproduction of music and movie soundtracks debuted in ...[more]

 FEATURES: Power Supply The Evolution 900e is equipped with two 3,000 VA transformers and 108,000 µF. This power source is the backbone for the output of the Evolution 900e. With this foundation, the Evolution 900e delivers 900 watts into 8 Ohms, 1,800 watts into 4 Ohms, and 3,600 watts into 2 Ohms. The FTC mandates that power ratings are quoted using a 1,000 Hz sine wave into a fixed ...[more]

Evolution One, the output impedance of the final gain stages is one hundredth that of the final gain stage in most power amplifiers. This provides extremely wide bandwidth and very high current capability. The Evolution One does not employ global negative feedback--the final gain stages use only 8 dB of local, nested negative feedback. This is one-five hundredth of the amount used in most solid...[more]

Highlights Substantial Class A power output of 250 Watts into 8 Ohms, 500 Watts into 4 Ohms, and 1000 Watts into 2 Ohms assures tremendous reserves of dynamic headroom for the reproduction of any source material. Available individually, in symmetrical pairs, and in three-piece and five-piece groupings to best address application needs. Fully active regulation via microprocessor based regulators f...[more]

The Full Power Balanced 650Mc Power Amplifier is the most powerful amplifier in the Krell Full Power Balanced Series. It provides the monumental power output of 650 Watts into 8 Ohm, 1300 Watts into 4 Ohm, and 2600 Watts into 2 Ohm loudspeaker loads. It is built in limited quantities and by special order. The model for this power house came from a custom amplifier that C.E.O. Dan D’Agostino design...[more]

The Full Power Balanced 350Mc Monaural Power Amplifier delivers Class A power: 350 Watts into 8 Ohm, 700 Watts into 4 Ohm, and 1,400 Watts into 2 Ohm loudspeaker loads. It offers high power and Krell Full Power Balanced sound quality for high-end two channel as well as high-end multi-channel sound system applications.The substantial current capability of the Full Power Balanced 350Mc provides sign...[more]

With the introduction of the Master Reference Amplifier in 1999, Dan D'Agostino established a level of amplifier performance without equal. The new X Series of Full Power Balanced monaural amplifiers are the direct descendants of this design. Sharing the same circuit topology as their stereo counterparts, the monaural amplifiers raise sound reproduction to a new level by dedicating an amplifier fo...[more]

With the introduction of the Master Reference Amplifier in 1999, Dan D'Agostino established a level of amplifier performance without equal. The new X Series of Full Power Balanced monaural amplifiers are the direct descendants of this design. Sharing the same circuit topology as their stereo counterparts, the monaural amplifiers raise sound reproduction to a new level by dedicating an amplifier fo...[more]

With the introduction of the Master Reference Amplifier in 1999, Dan D'Agostino established a level of amplifier performance without equal. The new X Series of Full Power Balanced monaural amplifiers are the direct descendants of this design. Sharing the same circuit topology as their stereo counterparts, the monaural amplifiers raise sound reproduction to a new level by dedicating an amplifier fo...[more]

The Momentum Monoblock Amplifier Achieving what was once thought impossible: incredible power and incomparable finesse in a compact chassis. Creating an amplifier that could meet all the demands of today's audiophiles required two things: one of the world's most talented and experienced designers, and a clean slate. The Momentum is the first amplifier offered by Dan D'Agostino under his own nam...[more]

The Momentum amplifier helped launch Dan D'Agostino Master Audio Systems and delivered magnificently on the initial design goals of formidable power and incomparable finesse from a compact chassis. Chief Engineer and Designer Dan D'Agostino started an engineering exercise that resulted in an exciting new breakthrough that D'Agostino felt compelled to include in the Momentum amplifier. This rese...[more]

Master Reference Amplifiers bring a new level of performance to sound reproduction and elevates the listening experience to unprecedented heights. Innovative technology controls the vast power generated by the amplifiers: Core technologies have been enhanced for exceptional power, control, and performance. These amplifiers build on the Krell legacy, providing a superabundance of power with unprec...[more]

THE PROGRESSION MONO DESIGN combines two normally exclusive traits—remarkable power output and exquisite musical finesse. Power is essential to realistic sound reproduction. The Progression mono amplifier is the largest and most powerful the company has made, delivering 500 watts into 8 ohms, doubling to 1,000 watts into 4 ohms and doubling again to 2,000 watts into 2 ohms. Of course, it ...[more]

The S-150m is a slim line monaural power amplifier boasting our latest circuit topology and a substantial power output of 150 Watts into 8 Ohms and 300 Watts into 4 Ohms. The elegant exterior houses the technology developed in the Krell Evolution amplifiers including Krell Differential Current Mode circuitry and balanced operation. The S-150m is the ideal choice for high performance systems in ...[more]