1) true holographic sound reproduction (amperex usa/heerlen holland + telefunken/siemens germany + mullard/brimar britain)
2) full frequency pleasant extended warm dynamics (heerlen holland + siemens germany + mullard/brimar britain + tesla czech)
3) natural organic tone w/ flat response, warm rich imaging (telefunken/siemens/valvo/lorenz germany + mullard mitcham britain)
4) precision bass w/ depth and lush musical resolve (heerlen holland + siemens/valvo germany + ei yugo + tungsram hungary)
5) dynamics, musical warm sound stage (amperex usa/heerlen holland + siemens/valvo germany + mullard blackburn britain)
6) clear layered detail, subtle tone compression (telefunken/lorenz germany + tungsram hungary + tesla czech + toshiba japan)
reference grade 1960/1961 philips amperex are musical holographic gems you can feel in your fingertips, the breath of life
these rare 7dj8 versions have a bit more linear presentation compared to 6dj8 variety, w/ even more upper-register nuances
not to be confused w/ later builds, these early editions feature the most precious metals, like a live concert in your living room
the low-bass is also better w/ additional kick and depth, often compared to 7308 sound stages full frequency detail reveal
these limited run large halos provide warm lush airy ambience, sought after highs w/ immersive involving vinyl-style intimacy
the textbook 'dutch house' cymbal-style sparkley resonant sonic resolve is revered by audiophiles for vocals + instruments
the euphoric sound stage is also incredibly expansive, offering up more head room extension ~ a popular tuning choice
for amps that are tough on 6922/e88cc tube lifetime, 7dj8/pcc88 are a very popular plugin long life sub
whether tube mics / preamps or hifi stereos, upgrade your resolution and fidelity w/ grail ranked listening
authentic⊿ delta heerlen holland etch codes, 1961 dj/⊿ 1e ~ 1960 dj/⊿ 0j + amperex boxes included