DBX Corporation

DBX Corporation Primarily known for a recording noise-reduction system developed in the early 1970s by David E. Blackmer and colleagues, and using more aggressive circuitry than the early Dolby A and B systems. The dbx technology (the company always printed its name in lower-case letters) achieved as much as a 30-dB reduction in tape hiss by means of a wide-range 2:1:2 compressor-expander voltage-controlled amplifier, with preemphasis/deemphasis and true RMS-level detection. In two…