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The Reference 80S stereo amplifier continues Audio Research’s latest design effort in creating a vacuum-tube amplifier that not only redefines ultimate music reproduction, but does it in an incredibly beautiful package.  Outwardly, the 80S shares the same dimensions as the 160M. A single shallow whisper fan is built into the bottom plate. Flexibility is built-in, too, with XLR an...[more]

The filtering is achieved with a bank of capacitors, totalling 300 000 μF. This supply concept, which ensures efficient energy transfer, allows immediate reaction on even the most abrupt transients. The Nagra Classic AMP is fitted with a traditional Nagra Modulometer on the front panel, showing the power of each output channel. An LED is also fitted to indicate saturations, exces...[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...[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...[more]

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The Inspiration 2 Stereo and Mono use the same Line Stage Gain Module input stage found in our top amplifiers. Hand-matched, low-noise transistors combine with a servo circuit that corrects any signal balance inconsistencies. The Inspiration 2 amplifiers’ Constellation Link interface connects to Constellation amplifiers to remove one amplification stage from the signal path, resulting in ...[more]

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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]

DarTzeel true passion for music reproduction, which they have nurtured for 25 years, led us on a long quest to design an audio amplifier that can convey the emotions at the heart of a musical performance.Absolute sounds are proud to introduce the long-awaited result, the darTZeel NHB-108 model one stereo amplifier.Most consumer products today—even some very expensive audio components—are designed ...[more]

Abundant power is required for realistic sound quality and is a cornerstone of Dan D’Agostino Master Audio Systems’ amplifier design. The Progression Stereo continues this practice. A graceful anodized Aluminum chassis houses a 2,000 VA power supply transformer coupled to nearly 100,000 microfarads of power supply storage capacitance. Paired to this foundation is a fully complementa...[more]