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Are you buying a classic Threshold preamp for the sound, or just chasing the badge? At US$1,300, this looks fair to slightly strong for a Threshold FET 1 unless it’s exceptionally clean, recently serviced, and complete; the closest hard anchors in the search results show a Threshold FET ten/e phono preamp also at US$1,300, while original Stereophile pricing for the FET 10/P was US$1,100 in 1987, so this isn’t a bargain-level ask for a vintage Threshold line stage.
What makes it worth a look is the Threshold/FET family’s reputation for fast, transparent, very low-distortion playback, especially with phono, and these units are sought after because they’re part of the Nelson Pass-era design legacy. If the seller can show quiet operation, original power supply, and no scratchy controls or channel imbalance, it’s a credible buy for someone who values vintage neutrality and build quality; if it needs service, that US$1,300 gets less attractive very quickly on a piece this old.
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.
