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This is a classic Phase Linear preamp from the 1970s that's been brought back to top shape on a professional repair bench. It's clean and quiet, with that warm, rich Phase Linear sound, and it's ready to drop into your system.**Service performed**- Fully recapped, new EQ RC4136 op amp- New output RCA jacks- Cleaned all jacks, controls, and connections- Cleaned the chassis- Bench tested and working perfectly, with no crackle or noise**Features**- Solid-state stereo preamp with a built-in moving-magnet phono stage- Phono, tuner, and aux inputs- Two tape monitor loops- Separate bass and treble controls for each channel, with switchable turnover points- Tone defeat switch and low-frequency EQ boost- Phase Linear's signature ambience circuit, with a rear output- Stereo/mono switch- Rated under 0.05% THD- Switched and unswitched AC outlets- Measures 19" W x 5.5" H x 6" DServiced by Caldera Electronics in Albuquerque, NM, an authorized repair shop with 20+ years in pro audio. Please see the photos for cosmetic condition. It'll be boxed well for shipping.
Compared with the obvious alternative—buying an unserviced vintage preamp at this price—US$375 is a strong deal. It sits below the US$400 median and comfortably under the US$322 25th-percentile threshold? Actually, it is above the 25th percentile, but still represents good value within the recent US$322–US$600 market range, especially given the servicing and replacement output RCAs.
The Model 2000 Series 1 is an unusually feature-rich, characterful preamp, with flexible tone controls and its distinctive ambience circuit; it can deliver clean, detailed sound with powerful bass while offering plenty to experiment with. Recapping and new output connectors address meaningful age-related concerns, making this much more attractive than a stock example. Before buying, confirm that the phono stage, switches, balance control, and all inputs operate quietly, and ask what the service actually included. At US$375, a properly functioning example is worth serious consideration.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Phase Linear was founded by Bob Carver in his home in Edmonds, Washington, around mid-1969, with the company officially launched in 1970 from a small building at 405 Highway Way. Operating as an American manufacturer during the golden age of high-fidelity audio, Phase Linear quickly established itself as an innovator in power amplification. The company remained independent until 1979, when Pioneer Electronics Corporation acquired it, though Phase Linear continued operating under its own brand until manufacturing ceased in 1983.
The brand built its reputation primarily on high-powered amplifiers, most notably the Phase Linear 700, unveiled in 1970 and delivering an impressive 350 watts per channel—a significant achievement for the era. This inaugural design became the company's flagship offering and exemplified their engineering philosophy of combining substantial output with reliable construction. Phase Linear's amplifiers became synonymous with driving demanding speaker loads and delivering the dynamic power that serious audiophiles sought during the 1970s and early 1980s.
Phase Linear occupies a distinctive position in audio history as a vintage collectible brand rather than a contemporary manufacturer. Among enthusiasts and restoration communities, the company is remembered fondly for solid build quality and components that continue functioning reliably decades after production ended. Today, Phase Linear equipment appeals primarily to vintage audio collectors and restoration hobbyists who value the brand's engineering heritage and the warm, characterful sound signature associated with classic 1970s amplification.
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