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PS Audio’s 5.5 sits in that sweet spot of older high-end line stages: respected, simple, and still appealing to people who want a straight, musical preamp rather than a feature parade. At US$450, this is a strong deal versus the current used market anchor of a US$700 median and US$455 25th percentile; it’s basically at the low end of fair and close enough to the bargain line to be worth quick attention.
That’s a good buy if it’s clean and fully functional, especially from a known-good system or original-owner setup. The upside here is classic PS Audio preamp performance at a sensible entry price, and PS Audio still supports service inquiries, which helps with vintage ownership. I’d mainly confirm no channel imbalance, noisy switches, or power-supply issues, but at this price those checks are normal diligence rather than red flags.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
PS Audio, a pioneering American hi-fi brand, traces its roots to 1973 when co-founder Paul McGowan launched the company in California alongside Stan Warren. Emerging from the analog golden age, it debuted with a standalone phono preamplifier, reflecting McGowan's early passion for vinyl playback honed through radio station connections and encounters with audio enthusiasts. The brand quickly evolved, embracing digital audio in the 1980s by releasing one of the first high-end CD players, the PS Audio CD-1, soon after Philips and Sony introduced the format.
Today, PS Audio specializes in premium electronics, including power amplifiers, preamplifiers, digital-to-analog converters (DACs), and integrated amplifiers, with a hallmark focus on power conditioning via innovative AC regenerators known as Power Plants. These devices, born from Stan Warren's mid-1980s discovery that oversized transformers enhance audio performance, remain a cornerstone. The lineup also encompasses digital lenses for refining streaming and disc playback, alongside select analog components, though it eschews speakers, headphones, turntables, or cables.
Positioned firmly in the high-end market, PS Audio commands respect among discerning audiophiles for its bold engineering and unwavering pursuit of musical purity. Celebrating 50 years in 2023, it occupies a niche as an innovator rather than a mass-market player, appealing to buyers who prioritize transformative power delivery and digital refinement in sophisticated systems.
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