Aphex Systems

Aphex is a brand of audio signal processing equipment. Aphex Systems was founded in 1975 in Massachusetts. The company changed its name to Aphex in 2010.

Formerly Aphex Systems, the company was acquired in mid-2015 by Freedman Electronics, parent company of Røde Microphones.

Aphex moved in 2011 to Burbank, California, and in 2014 moved its main offices to Salt Lake City, Utah. Aphex manufactures pro audio products, primarily in the Burbank and L.A. area, with a few products manufactures in Asia. Aphex has design and engineering facilities are in Salt Lake City and California.

Aphex builds products for the professional audio, broadcast, fixed installation, touring-sound and home-recording markets. It has developed a number of technologies and products, such as the Aural Exciter, Compellor, Dominator, Expander/Gate and Expressor, plus the Model 1100 Two-Channel and Model 1788 Eight-Channel Ultra-Precision Remotely Controllable Microphone Pre-Amplifiers, and the Model 2020 Mk III Broadcast Audio Processor. A key element of all the dynamics processing products is the voltage-controlled attenuator, the Aphex VCA 1001. Another key element is Aphex' input and output circuitry, using electronic balancing techniques instead of transformers. In late 2000, Aphex introduced a digital signal transport product, the Anaconda 64-Channel Bidirectional Digital Snake.

Today, Aphex is focused on its latest Exciter and Big Bottom processing and Compellor compression technologies, with new patents pending and new products in the line. Key among these are a series of USB connected products:

The Aural Exciter is said to enhance clarity and intelligibility by adding phase shift and musically related synthesized harmonics to audio signals. The Big Bottom circuit combines a low-pass filter and dynamics processor to compress and delay incoming low-frequency information. The process is reverse amplitude dependent, meaning that more is applied as the input level drops and less as the signal gets hotter. Together the dynamics processor and time delay create sustained bass frequencies that are perceived as being louder yet do not noticeably increase peak output.

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