Audio Products

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]

Highlights Fully balanced circuitry from input to output insures signal integrity, rejects noise, and improves signal-to-noise ratios to deliver a "night and day" sonic difference when compared to typical single-ended circuitry. Computer regulated power supply provides consistent sound quality at wide dynamic range regardless of fluctuating line voltages. Current mode operation ensures wide b...[more]

The Full Power Balanced X Series Stereo Amplifiers offer the greatest performance possible from a stereo amplifier. All X Series amplifiers share the same circuit topology, from the 300 Watt Full Power Balanced 300cx and the mid-level FPB 400cx at 400 Watts, to the awesome 700 Watt FPB 700cx, the most powerful stereo amplifier ever offered by Krell. While the amplifiers have much in common, there ...[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]

GS150 POWER AMPLIFIER An amplifier is the workhorse of any system – it is responsible for receiving small signals from a preamplifier or source component, and developing them into larger currents to control a loudspeaker. To that end, the GS150 has been designed to seamlessly integrate into any system and steadfastly perform its task. Challenging source material and difficult sp...[more]

A preamplifier, amplifier, phono stage, and digital to analog converter all in one chassis, the GSi75 combines with your favorite speaker to deliver a singular and simple solution to control your listening system. Unlike other integrated designs that make performance - sacrificing compromises to fulfill a price point or form factor, the GSi75 harnesses the power and technologies developed by...[more]

We call it "Hybrid Drive" because that’s how it works.  As in the REF110, a JFET input (for low noise) feeds a 6922 dual triode gain stage, which in turn feeds a 6H30 dual triode cathode follower which drives the outputs through our proprietary coupling capacitors (first used in our REF3 preamp).  This vacuum-tube input/driver arrangement sets the stage for superbly musical perform...[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]

The Stereo benefits from the same upgrades we made to the Mono. The power supply features substantially larger storage capacitors, to deliver cleaner DC power and more headroom on loud peaks. The pure copper bus bars used for the speaker outputs and power supply rails are twice the size of those in the original Hercules. Both of these improvements allow the Hercules II Stereo to perform even be...[more]

The Constellation Audio Inspiration INTEGRATED 1.0 is the newest member of Constellation Audio's most affordable Inspiration Series, and joins its preamplifier and amplifier line-mates in delivering the performance that is expected from Constellation Audio at a more affordable price. Delivering plenty of power, 100 wpc into 8 Ohms (and twice that into 4), a full array of balanced and single-end...[more]