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This is a buyer’s market for this category at US$74: that sits well below the US$182 median and even under the US$57 lower quartile by only a modest margin, so it reads as a strong-value asking price rather than a stretch. Against a market where the middle of the pack is much higher, this is the kind of listing that deserves attention.
What makes it worthwhile is the basic promise of a clean, working line-stage preamp at a low entry cost: if it’s genuinely tested, you’re paying little for a component that can add input switching, volume control, and a bit of system flexibility without moving into big-money territory. For this price, the key buyer checks are simple: confirm all inputs/outputs work quietly, the controls are scratch-free, and any power supply or accessories are included.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Line Magnetic Audio: Brand Overview
Line Magnetic Audio was established in 2005 in Zhuhai, China, by brothers Zheng Cai and Zheng Xi, both passionate audiophiles with deep roots in tube electronics. Zheng Cai's background as a former general manager and chief engineer at Cayin, combined with years spent studying and restoring classic Western Electric, Altec, and Jensen components, provided the technical foundation for the company. This heritage of reverse-engineering and understanding legendary 1950s American audio design remains central to Line Magnetic's identity and philosophy.
The brand specializes in tube-based electronics and speakers, with a product range spanning integrated amplifiers, preamplifiers, power amplifiers, DACs, phonostages, and horn-loaded loudspeakers. Line Magnetic is particularly renowned for its meticulous replicas of classic Western Electric, Altec, and Jensen designs, as well as proprietary field-coil drivers that have earned respect among both manufacturers and DIY enthusiasts. All products are hand-assembled using point-to-point wiring across two factories, reflecting an uncompromising manufacturing philosophy.
Line Magnetic occupies the high-end boutique segment, targeting discerning collectors and audiophiles who value vintage-inspired design married with modern engineering. The brand commands respect for its scholarly approach to audio history, rigorous material research, and unrelenting build quality. Rather than pursuing mass-market appeal, Line Magnetic has cultivated a devoted global following among those seeking authentic tube sound and meticulous craftsmanship.
See all Line Magnetic Audio listings on RADAR.
