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The unknown condition is the main variable, but at USD 400 this looks like a strong deal if it is complete and functional. That price sits below the USD 455 25th-percentile comparable, well under the USD 800 median, so there is meaningful room for an excellent buy rather than merely a fair one.
The model identification is a little thin, and the PS Audio “7.0” is an older, less commonly documented preamplifier, so confirm the exact version before paying. Its appeal is straightforward: a serious line-stage component from a respected specialist, potentially offering a substantial upgrade over ordinary mass-market preamps for modest money. Check that both channels are quiet, the controls and inputs behave properly, the power supply is correct, and the original remote or unusual cables—if required—are included. At USD 400, cosmetic wear is tolerable; undisclosed functional issues are not.
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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