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A used DBX power amp like this was a serious pro-audio piece when new, and at US$100 it sits just below the US$100 25th percentile in your recent comp set, with the median at US$145 and the 75th percentile at US$386. That makes it a strong buy rather than a merely fair one, especially for a vintage USA-made unit if it powers up cleanly and hasn’t been abused.
The appeal here is straightforward: DBX gear from this era is typically built stoutly, with real-current output and the kind of no-nonsense reliability that suits subwoofer duty well. For a buyer, the key upside is getting a capable, well-regarded amp at a bargain-level entry point; just confirm both channels work, the chassis isn’t rusty, and any needed cabling or rack ears are included, since those details matter more than cosmetics at this price.
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.
