1x Vintage NOS TungSol USA 5751 ~ Amplitrex DigitalTested ~ NeutralTone Musical Dynamics Holographic Transparency GrailClassic / Preamps Pedals GuitarAmps /Top Grade 12AX7 ECC83 ~ ECC803 E83CC 7025 Altv

the high power 5751 are premium 12ax7 ecc83 w/ slightly less gain, introduced in 1949, as military spec and industrial grade

originally designed for aviation, the costly hand-made design is rugged, w/ less microphonics, and w/ higher power at 175ma!

this higher current upgrade (12ax7 = 150ma) all w/ 30% less gain, is a great way to tame your distortion stage w/ less noise

revered for their attention to detail, craftsmanship, design, and sonic playback, vintage tungsol are audiophile crown jewels

est 1907. tungsol is known for military and commercial vacuum tubes, all huge hits to this day! + becoming rare collectibles

this includes the sought after 5998, original development of the 5687 in 1948, and the 6550 in 1954 (as a response to the kt88)

+ by supplying cathode materials on an oem basis, tungsol was unique among giants: general electric, rca, and western electric

tweak, tune-up and transform your measured feedback, system definition, tonal warmth, and fundamental articulation

tungsols open sound stage provides super accurate positioning, while spacious in spirit, all w/ a flat balanced low-end

quite detailed, involving attack, and immersive qualities, while retaining tonal transparency and a smooth soulful realism

often compared to telefunkens clean house sound, tungsol are legendary for balance, resolution, dynamics, w/ a tight bass stage

+ musical, great bite, revealing even/odd harmonics, and dimensional frequency bloom, all contributes to the rising-value lore

few brands handle both delicate + thunderous passages w/no mascara, from the pluck of acoustic strings, to live-concert vocals

enthusiasts often find tungsol to be one of the best versatile all-arounders, w/ more neutral playback than warm thick-mid rca 

+ features carbide plate rods, to radiate heat, reduce temps, protect the cathodes, and enhance tonal-breakup characteristics

12ax7 ecc83 cv4004 5751 e83cc ecc803 6057 6681 7025 7058 7729 

b339 cv492 cm1 b759 m8137 12rhh14 12rll3 6l13 E2164 E813CC 12DT7 +

1x old school 5751 (top grade 12ax7 ecc83) by tungsol usa, authentic stop sign etch, + digital tested! 

boxed vintage, silkscreen visible, carefully curated classic audiophile tube

full mutual conductance gm micromhos test + life, leak, short, gas, sound checks: several in stock

our high output test measures the entire linear curve (eg-ip), applies 250v, all w/ filtered dc, simulating actual circuits

+ undergoes a proprietary refurbish and complimentary deox process, a one of a kind value-added quality control!

always give several sessions (150+ hours) w/ your specific amp/mic/systems specific voltage to fully cure

this ensures a proper break-in, opens up sonically, all w/ no muted nos qualities leftover

ships well packed worldwide! priority/express available by request

~ elevate to warmer hifi! w/ authentic vintage audiophile preamp / power / rectifier / mic tube curation ~