Description

sylvania tubes have a long tenured history, w/ incredible engineering, long life premium quality, and revered sound reproduction vintage 6dj8 ecc88 military issue, ulra low-noise-floor, smooth performer + great clarity! features frame grid even/odd harmonics this translates into a higher resolution sound stage, w/ better spatial separation, and no island effect like other 6dj8 brands the tonal coloring is quite neutral, flat, responsive, and transparent, w/ subtle warmth especially for vocal/treble playback realistic instrumentals, acoustics, and percussion, w/ a liquid discreet bass stage, and w/ military grade selection process 2 x old stock military edition 6dj8 ecc88 by sylvania usa, copper neck getter and frame grids, boxes also included plugin for 6922 applications including tube mics, preamps, phonos, stereos, rode k2 / at-4060 audio technica + more full mutual gm conductance test, pristine pair: 101/100 ~ 99/100 % gm (65 % min good) our high power gm output test applies up to 250v w/ filtered dc, more than many other testers + useful life test pass (longetivity indicator) + an impeccable gas/leak/short check + complimentary refurbish and deoxit process, one of a kind value-added quality control give several sessions (up to 100+ hours) w/ your amps voltage to fully cure / break-in ships well packed worldwide w/ free economy postage! ~ authentic vintage hifidelity audio / mic / power / preamp tube curation by caliacoustics ~ see our official site for new arrivals, limited editions, sealed-box true-nos rarities, and more collectibles