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At ATI, we make heavy-duty amplifiers with proven circuitry, meticulous assembly and rigorous testing designed to deliver state-of-the-art audio for years, all designed by us and built in our own US factory. It’s a simple story, American amplifiers built by American people. We hope you enjoy listening.


Amplifier Technologies assembles all of our amps at our Los Angeles, California factory under a combination of careful hand-built and automated procedures. Always built to exacting specifications, quality control, listening and performance testing are constantly performed at our 50,000 square-foot factory.


At the heart of any amplifier is the power supply. Its foundation is the power transformer. For the transformer’s core we use MOH with magnetic properties that increase efficiency 18% over conventional units. Winding the core two wires at a time, a technique called “bifilar winding” that ensures perfectly symmetrical transformers that maximize efficiency and reduce distortion Each amplifier channel gets not only its own set of transformer windings, but its own rectifier and storage capacitors, thus giving each channel its own separate power supply. Even if the left channel is pushed to the limit by, say, a loud car crash on a movie soundtrack, it does not affect the power available to the other channels.


Because we design our amplifiers for the home as well as the rigorous demands of commercial applications, we use substantial heat sinks for each channel. This results in amplifiers that are absolutely quiet and run as cool as possible. The result: there is no noise to mar the listening experience and the amplifier operates more efficiently for a longer life.


We use double-sided FR-4 glass epoxy circuit boards in all our products. Not only does a double-sided board handle twice the electrical current of a single-sided board, it produces much more solid connections to the components on the board. The solder joints that secure the components to the board over both surfaces of the board, plus the inside of the hole into which the component leads are inserted. As a result, our circuit boards are practically perfect, with nearly zero failures due to bad connections or cold-solder joints.

The components we use on our circuit boards also add to the quality of ATI products. To insure that each and every circuit board functions exactly like the last, all of the gain stages in our products employ high-quality metal-film resistors with 1-percent tolerance.


Gold plated RCA jacks and robust XLR connectors with gold contacts on our amplifiers are mounted directly rear chassis panel and not to the circuit board. While this technique complicates the assembly process, the result is a more robust connection and the jack cannot be accidentally broken off by tight-fitting audiophile RCA plugs or heavy XLRs.


ATI amplifier employ lightning-fast optically-coupled protection circuits that are completely removed from the signal path so they cannot affect the sound quality. These protection circuits sense electrical “shorts” in speakers or wiring and sense electrical “spikes”. If triggered, the circuit instantaneously disengages the output, samples the affected circuitry every 10 seconds and automatically restores proper operation when the fault is corrected. This special feature minimizes the chance of your amplifier going out of service just when you’ve filled your home theater with expectant guests.