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Ray Tubes is a premium vacuum tube manufacturer based in Oakland, California, specializing in new-production vacuum tubes designed specifically for audiophile and high-end audio applications. Under CEO Nelson Wu's leadership, the company operates with a mission to supply the industry with easily accessible tubes through its global network of retail and brand partners, offering hassle-free purchasing with consistent performance, price, and availability backed by an industry-leading one-year warranty against manufacturing defects. Ray Tubes sources tubes from a factory in China with stringent quality control, where Ray engineers onsite continually monitor production runs to guarantee finished tubes meet their exceptionally high standards. The company offers three distinct product collections: the value-focused CORE collection featuring reliable tubes that rival New Old Stock performance; the premium SELECT collection with hand-picked tubes meeting stricter audio engineer criteria; and the ultra-premium RESERVE collection featuring monocrystalline carbon coating for improved electron flow, increased heat dissipation, and reduced noise. Recent product launches include SELECT 6SL7, SELECT 12AU7, CORE 12AU7, and SELECT 5U4 vacuum tubes, demonstrating the company's commitment to expanding their comprehensive range of common tube types including 12AU7, 12AX7, EL34, 6SN7, KT88, and 300B models for modern hi-fi amplifiers and audio equipment worldwide.