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Drop + THX AAA 789 linear headphone amplifier. Front: 4-pin XLR balanced output, 1/4" and 3.5 mm single-ended outputs, 3-step gain switch, volume and input select. Rear: balanced XLR and RCA inputs, RCA pass-through, Auto Off / Bypass switch.Includes the power supply shown in the photo.Sold as-is, no returns. Item is exactly as pictured and described; all wear is shown in the photos.
New, the Drop THX AAA 789 sold around US$299, so US$219 used is above your comparable median of US$161 and slightly above the US$209 75th percentile. That makes it an ambitious ask, particularly with condition listed as unknown; a more convincing buy would be closer to the mid-US$100s to around US$200.
The 789 remains a well-regarded, powerful desktop amplifier with both balanced XLR and single-ended RCA connectivity, excellent measured performance, and enough drive for demanding headphones. It can still be a very satisfying, flexible centerpiece, but at US$219 the seller should substantiate the premium with genuinely excellent condition, a complete original power supply, and clean operation from every input and output. Without that reassurance, negotiate.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Drop originated as Massdrop in San Francisco in 2012, pioneering a community-driven model that aggregated enthusiast demand to source and develop exclusive products directly from manufacturers. By bypassing traditional retail chains, it built a loyal following of over 7 million members through limited-time "drops" of unique gear, earning acclaim for delivering hard-to-find items at competitive prices. The brand rebranded to Drop in 2019, expanding into its own designs like the Drop SHIFT mechanical keyboard and wireless headphones, often in collaboration with names such as Sennheiser for audiophile-grade audio.
In the hi-fi realm, Drop specialized in headphones, DACs, amplifiers, and cables, alongside mechanical keyboards and gaming peripherals, with audio as a flagship category. Its approach emphasized user feedback to refine products, yielding sought-after collabs like the Massdrop x Sennheiser line, blending accessibility with performance for enthusiasts.
Drop held a niche position as a disruptor in the mid-tier market, appealing to savvy buyers seeking value-driven, community-vetted hi-fi without high-end premiums. Acquired by Corsair in 2023, it shifted toward gaming hardware before shuttering its core operations in March 2025, marking the end of an era for direct-to-consumer audio innovation.
See all Drop listings on RADAR.
