Audio Research Signals New Era with All-New Product Series

The I/50 Integrated Amplifier is the first product in an all-new series from Audio Research since the company was sold to Trent Suggs by the McIntosh Group. The new product series sends a clear message with a functionally simple and visually engaging design, while staying true to the company's values of sounding musically sublime. This is a product that responds to market demands, and builds upon the company's values, as the company's president and new owner promised.

When this great tube amp project was published originally in Glass Audio magazine, Ed Dell wrote “Joseph Norwood Still is pushing the envelope. His most recent triode design, which features the Svetlana 6550s and Hammond transformers, establishes new output limits—up to 100W.” Indeed, this would become a very popular project at the time, and still is, considering the frequent references. This article was originally published in Glass Audio 3, 2000.

Many articles have appeared regarding projects using one of the most sturdy, versatile, and trustworthy audio tubes ever made — the 6550. Most of them show these audio beauties used in the push-pull configuration in order to obtain the greatest efficiency and the most power output. In this article, the 6550 is used in a clean, sweet-sounding, single-ended design. The amplifier has very few parts, is easy to build and repair, and the cost of the project is nominal when you consider the kind of sound that is produced. This article was originally published in audioXPress, September 2001.