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At US$191, this is comfortably below the common used asking prices I found for the CX-3, which tend to cluster around US$300–US$350 and can run higher for restored examples, so it reads as a strong buy rather than a stretch. Against similarly priced vintage preamps, this is the kind of listing that can stand out if it’s complete and functioning properly.
The CX-3 has a good reputation as a serious late-’70s/’80s control preamp: clean, flexible, and part of a cult-favorite dbx stack that still has real appeal with matching BX-3 gear. At this price, the upside is in getting a well-built, interesting preamp with likely collector pull; just make sure the unit is quiet, switches cleanly, and includes any needed accessories, since originality and working condition matter more than cosmetics here.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Founded in 1971 in the United States by audio engineer David Blackmer, dbx emerged from his pioneering work in dynamic range processing. Blackmer, whose initials inspired the brand name, initially developed decibel expansion technology to enhance audio fidelity, aiming to capture the realism of live performances. The company's early innovations, including the dbx 202 "Boom Box" bass amplifier and the iconic dbx 160 compressor/limiter, quickly established it as a staple in professional studios and live racks during the 1970s and 1980s.
dbx specializes in professional audio signal processing equipment, with a legacy built on compressors, limiters, and noise reduction systems. Its lineup has expanded to include microphone preamps like the 286s, speaker management systems such as the DriveRack PA2, and modern rackmount processors in the CX and 500 Series. While it briefly ventured into consumer gear like speakers and amplifiers under BSR ownership in the late 1970s, dbx has steadfastly focused on pro-audio tools leveraging proprietary technologies like True RMS detection.
Now a division of Harman International (under Samsung), dbx holds a respected mid-tier position in the professional audio market, prized by engineers for reliable, workhorse dynamics control in broadcasting, live sound, and recording. Vintage models remain collector favorites, but current offerings compete effectively against digital rivals, blending heritage innovation with robust build quality for demanding applications.
See all DBX listings on RADAR.
