Gary Reber, of Widescreen Review, interviews Morris Kessler, founder of Amplifier Technologies Inc.
In Part 1, they explore Morris Kessler's humble beginnings in hi-fi as a teenager, building tube amplifiers, starting the SAE company, which by the late '70s and early '80s, became one of the largest high-end brands in the world, designing, manufacturing and selling, power amplifiers, preamps and FM tuners.
In 1988 Morris sold SAE and retired, but in 1993 he became interested in computer aided design (CAD), built a stereo amplifier for fun and caught the bug, again. Morris took the new amp to CES to see if he could drum up any interest and ended up getting requests to build amps for other companies and thus Amplifier Technologies Inc. was born.
ATI has since sold hundreds of thousands of amplifiers worldwide under the ATI name as well as private labeling for at least a half-dozen companies whose brands you would definitely recognize (Adcom, Crestron, Datasat and others). In addition, they delve into and compare the various Class of amplifiers; A, B, AB and C as well as the efficiencies of Class D amps.
In Part 2, they talk about the high quality and more expensive components that ATI uses in their amplifiers, such as thermal-trak semiconductors, mylar capacitors, super-low-noise metal film resistors, heavy copper glass circuit boards, the neatness of the wiring and clean design of the layouts inside the chassis.
They also discuss fully balanced amplifier topology, passive cooling and their latest AT6000 Signature Series amplifiers which utilize current feedback instead of the more commonly used voltage feedback in order to improve performance. They examine the benefits of each amplifier channel having it's own power supply and explain the advantages of using toroids for their transformers.
Morris has been designing and manufacturing solid state amplifiers for over 55 years and their Signature Series amplifiers now have an incredibly low distortion of 0.003 percent and a signal-to-noise ratio approaching 130 dB.