1) holographic sound reproduction (amperex usa / heerlen holland + telefunken / siemens germany + mullard gt britain)
2) long-listen full frequency w/ pleasant extension (heerlen holland + siemens germany + mullard gt britain + tesla czech)
3) natural organic tone w/ flat mid band response (amperex usa + telefunken / siemens / valvo germany + mullard mitcham)
4) precision bass w/ depth and lush sonic resolve (heerlen holland + siemens / valvo germany + ei yugo + tungsram hungary)
5) warm musical dynamic sound stage (amperex usa / heerlen + siemens / valvo germany + mullard blackburn + bugleboy)
6) clarity w/ layered detail and subtle tone compression (telefunken / lorenz germany + tungsram hungary + tesla czech)
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an audiophile classic, very rare pq heerlen e88cc gold pins w/ musical mid band euphony vivid detail and lush sibilance
the special early amperex star series are the top echelon w/ unparalleled vocal fidelity and transparent linear response
these early build 1962 holland tubes are legendary for their warmth, cymbal-style resolve and linear frequency response
full body and tone articulation, ambient intimate holographics via strategically less rf resolution than amperex usa pq!
the legendary philips 2nd/3rd sound stage harmonics illuminate and subtley color stereos preamps tube mics + more
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these limited run special star types have more precious tube-era metals and warmth = reproduces sound more accurately
the rare premium quality 'pq' star series feature improved cathode durability for mission critical instrument grade apps