Founded in 1974 Jensen Transformers, Inc., is a manufacturer and developer of high performance audio transformers. Tens of thousands of Jensen transformers are in use today throughout the world, and maintain a flawless reputation for superior quality and reliability. The company has extended its engineering expertise to the production of related electronic products that adhere to the basic philosophy of uncompromised high performance.

Deane Jensen, the original founder, embarked on a quest in the early '70's to unravel the shortcomings of audio transformers. He realized that transformers of that era were often the root cause of "bad" sounding equipment and therefore committed heavily to basic research related to precision and waveform fidelity. Much of this pioneering work focused on audio transformers and their interface with system electronics. Jensen designed transformers having the response of a Bessel low pass filter, which by definition, has virtually no phase distortion, ringing, or waveform overshoot. Initially, Jensen Transformers' development lab and office was an apartment in Hollywood. By 1980, the transformers had become the industry standard facilitating a move to larger offices. Jensen now resides in Chatsworth, California.

The Jensen slogan "Bringing Science to Sound", is not used lightly. Deane Jensen received Mix magazine's prestigous lifetime achievement award posthumously in 1990 for his important contributions to the professional audio industry. Today, the Jensen staff includes several engineers expert in analog circuit design and transformer applications. Research and development is performed on site in a quarter million dollar state-of-the-art laboratory. Jensen engineers use some of the most sophisticated computer aided design tools available, including COMTRAN®, a linear circuit analysis and optimization program developed by Jensen and used by thousands of engineers worldwide. Important Jensen innovations include the unique input stage design used in the 990 amplifier, which was patented by Deane Jensen in 1981, and the In-Genius® balanced line receiver, which was patented by Bill Whitlock in 1996.

Strict quality controls are maintained over every facet of production from raw materials through final test to ensure that Jensen products are the best available. Each transformer is rigorously tested both before and after encapsulation. Certified testing, including serialized printouts of all measurements on each unit, is available.