Description

vintage amperex are grail rated audiophile crown jewels, revered for their musicality, tonal transparency, and lively detail the dutch 'house sound' is rich warm resonant, resolving and sparkley, adding fidelity to vocals, w/ a nice balanced mid-band the juicy bloom, dynamic treble, depth, presence, and holographic sound reproduction, all contribute to the collectible lore these 1964 small halo editions (w/ same codes) are sought after for their precision and additional accuracy over large halos the legendary hp selection process was incredibly thorough for their scientific instruments reliability + revered by audiophiles whether its a preamp, stereo, tube mic, or hifi setup, upgrade definition and add luminous fidelity to any 6922 6dj8 circuit! 2 x old stock seam-top special hp selected 1964 white label amperex by philips heerlen holland 6dj8 ecc88 fair silkscreens w/ amperex boxes included, authentic netherlands ga ⊿ 4j4 / ga ⊿ 4j4 e tch codes visible full mutual conductance gm test, quite strong pair: 115/100 % gm ~ 110/120 % gm (65 % min good) our high power gm test simulates real circuits, and applies up to 250v, more than many other testers + undergoes a value-added complimentary refurbish and deoxit process ~ one of a kind seller quality control + important life test pass (key longetivity indicator) + impeccable leak / short / gas check give several sessions (100+ hours) w/ your amps voltage to fully cure / break-in ships well packed worldwide w/ free economy postage! ~ authentic vintage hifidelity audiophile / preamp / power / mic tube curation by caliacoustics~ see our official site for new arrivals + limited edition collectibles + rare true nos sealed box + pinched waist rarities + high-resolution headphones + reserve/request/special pricing options