Pass Labs

Pass Labs is a high-end audio company based in Auburn, California, in the United States, founded by Nelson Pass in 1991. Pass Labs developed prototypes of Class A amplifiers with single-ended circuitry. Among the company’s first products was the ALEF range of amplifiers, featuring unique technology and design. Pass Labs developed Super-Symmetry technology, which it continues to use in its top-of-the-range products to this day. Pass Labs specialises in the conception, engineering and design of high-end amplifiers and preamplifiers.

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