2 x NOS 12AU7 ECC82 Philips Amperex 1969 Holland NL Heerlen⊿ 9 HolyGrail AudioTube ~ Musical Transparent Detailed Warm Lively Dutch House

the breath of life! vintage philips amperex white label are revered bugle boy alternatives, made in heerlen holland 1969 one of the best ranked 12au7 ecc82 variants ever made w/ the textbook dutch 'house sound', lively, transparent, expansive mids the shimmery musical warm resolve adds articulation to a variety of instruments, percussion, acoustics, and especially vocals! rich vinyl style intimacy, a spacious vivid sound stage, deep yet controlled bass depth, and pin-point responsive accuracy the ultra low noise, rugged quality metallurgy, and holographic sound reproduction, all contribute to amperexes collectible lore 2 x old stock philips amperex 12au7 ecc82 w/ nice silkscreens and visible heerlen etch codes from 1969, ⊿ 9i4 / ⊿ 9b3 thick seam-top flashing, rugged mica stabilizers unique to 1969, and philips frame grids, all capture high resolution imaging twice tested, audio screened, and underwent a complimentary refurbish + deoxit process ~ one of a kind value-added qc full mutual conductance test, perfect balance match: 110/109 ~ 109/109 where 56 is good via tv7 (114/113% ~113/113%) our high power mutual gm output test applies 250v w/ filtered dc, much more than other testers + important life test pass (longetivity indicator) + impeccable leak / short / gas test give 150+ session hours w/ your amps voltage to fully cure / break-in ships well packed worldwide