12AU7 5814A Sylvania VINTAGE 3 Mica O-Getter Matched Pair

RARE VINTAGE USA-MADE SYLVANIA PAIR — ACTUAL PHOTO 💎 Classic 5814A / 12AU7 dual triodes with premium 3-mica construction and O-getter design. Carefully selected preowned stock from the USA, ideal for refined tube rolling and high-end audio systems. Tube Details and Codes 📌 • US Tube Type: 12AU7 • European Equivalent: ECC82 • Brand: Sylvania • Construction: 3 Mica, O-Getter • Origin: Made in USA • Matching Status: Matched Pair Testing and Performance ⚡ • Strong emissions confirmed on TV-7 tester • Tested for usable strength and stable operation • Good candidate for quiet, dependable performance in audio circuits • Supplied exactly as shown in the photos Sonic Signature 🎵 • Known for balanced tonality with smooth midrange flow • Excellent detail retrieval with a natural, musical presentation • Well suited for preamps, drivers, and premium hi-fi applications