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This is a fair ask, leaning slightly to the high side of fair. At US$90, it sits above the US$82 median but still inside the recent US$79–US$86 interquartile band, so it’s not a bargain, but it also isn’t meaningfully stretched for the market.
The DBX XB-140 is the kind of compact sub that can be a solid buy if you want straightforward low-end fill without taking up much space. The upside here is in the usual used-audio sweet spot: if it’s clean, functions properly, and includes the right hookup pieces, you’re paying for a known-name sub rather than gambling on a budget replacement. Since the price is already a touch above typical, I’d want confirmation that the driver, amp, and controls are healthy and that there’s no hum or intermittent power behavior.
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.
