1963-1964 mullard are the top sonic echelon for their rich holographic sound reproduction, 2-year only special gold limited runs
like a live pub concert in your living room, the true harmonic sound stage of mullard is warm and captures immersive lush fidelity
revered metallurgy worldwide by audiophiles, legendary for liquid dynamics, sparkley highs, and great rich ambient bass resolve
whether playback or production, the vinyl style intimacy is sought after for vocals, instrumental fidelity and percussion depth
authentic blackburn b3i2 ~ b3j4 ~ b4e2 etch codes w/ nice gold silkscreens, thick top-getter flashing w/ seam-tops
all tubes are twice tested, circuit auditioned, and ship w/ free worldwide postage + mullard boxes
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full conductance balance test / good used set 84/70~84/74~70/76 % mutual gm (65 % good) + important life test pass
our life test is a key longetivity indicator, and our unique gm output test applies 225 vdc simulating actual circuit load
all tubes are also checked w/ an impeccable gas + leak/short check, and a proprietary complimentary refurb deox process
give 100+ session hours w/ your amps voltage to fully cure/settle (break-in is important) ~ ships well packed
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authentic vintage hifidelity audiophile tube curation by caliacoustics
see our official website for reserve/request options! + limited special editions 
+ collectible true-nos sealed box rarities + high-resolution headphones