3 x Sylvania USA Triple Mica Edition 5751 ~ Holy Grail ~ GB ECC83 12AX7 Upgrade

Description: the legendary 5751 sylvania triple mica is an audiophile crown jewel! holy grail status, premium 12ax7 ecc83 w/ less gain known for articulation and complex tonalities, sylvania was one of the first companies to ever make 12ax7 (well before ecc83) revered by audiophiles, and considered the top sonic echelon for its low noise, and pure holographic sound reproduction regarded as a 3-dimensional immersive sound stage, highly musical, subtle warmth, and lush transparent clarity w/ realismrare collectible burroughs (nixie) and gb 'gold brand' editions which listeners seek out, reviews outranking mullard and even rca introduced back in 1949, 5751 are a military spec rugged industrial grade high performance 12ax7 ecc83 plugin suboriginally designed for aviation, triple-mica 5751 were costly, and feature a slightly higher current of 175ma (vs. 150ma 12ax7) w/ 30% less gain, they are a great way to tone shape your amps harmonics and tame your distortion stage w/ less microphonicsthis reduced compression affects your overdrive, great for higher volume, and adding spank and sparkle brightness full gm conductance test, good w/ more headroom/less gain than nos: 84/78 ~ 74/81 ~ 70/80 % gm (65% min good) + important life test pass (longetivity indicator) + impeccable gas test / leak / short check+ complimentary value-added refurb screening deox process, one of a kind qc give several sessions or up to 100+ hours w/ your specific amps voltage to settle in / break-inships well packed worldwide w/ free economy postage ~ authentic vintage hifidelity audio / preamp / mic / power tube curation by caliacoustics ~see our official site for reserve/request options, new arrivals, true-nos sealed box rarities, and limited run special editions

Price: 375 USD

Location: Leander, Texas

End Time: 2024-09-17T14:19:25.000Z

Shipping Cost: 0 USD