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This is a clear buyer’s market for vintage Threshold preamps right now, and the US$199 asking price for the Threshold FET 9 is a genuine bargain, sitting far below the 25th percentile of US$499 in our database and nearly 75% under the median of US$800. With the 75th percentile at US$1,100, this listing is an exceptional deal by any standard, especially compared to the US$600–US$750 Euro range (roughly US$650–US$820) often seen for well-cared-for units abroad.
The FET 9 is Nelson Pass’s celebrated solid-state preamp, offering 20dB gain and 8V RMS output with exceptional precision and transparency that still rivals modern designs. Its vintage appeal, original-owner rarity, and the fact that it was a US$2,595 flagship-caliber junior sibling to the FET 10 make this US$199 price a rare buying opportunity. No caveats are needed at this price; even if electrolytics need replacement, the upside is massive.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Threshold Audio emerged in Sacramento, California, in 1974, founded by renowned audio engineer Nelson Pass alongside graphic designer René Besne and Joe Sammut. Pass, a pioneer in amplifier design, launched the brand with the groundbreaking Threshold 800A power amplifier in 1975, introducing a novel sliding bias system that boosted Class A efficiency while employing 48 output transistors in a sophisticated triple-series/triple-parallel configuration. This California-rooted heritage defined Threshold as an innovator during its original run, which spanned until the mid-1990s, after which the intellectual property changed hands, including a 1994 acquisition by investor Randy Patton, who integrated it with PS Audio and relocated operations to Camarillo.
The brand focused squarely on high-end amplification, producing iconic power amplifiers like the 400A and 800A, the Stasis series renowned for their balanced Class A performance, and preamplifiers such as the NS10, SL10, and FET range including the FET-1, FET-2, FET-9, and FET-10. Later designs, like the T-200 by engineer Michael Bladelius, continued this legacy. Threshold eschewed speakers, turntables, DACs, headphones, or cables, concentrating instead on pure analog amplification that prioritized sonic purity and robustness.
Threshold holds a revered position as a vintage high-end icon, cherished by collectors and audiophiles for its enduring sound quality and Pass's technical wizardry. Once a market leader in premium solid-state gear from 1975 to 1992, it remains a sought-after name in the used market, embodying boutique excellence rather than mass production, with modern revivals under Threshold Audio sustaining its elite reputation.
See all Threshold listings on RADAR.
