legendary bugle boy edition audio preamp mic tube, the sonic top echelon from⊿ philips amperex!
holland tubes are regarded as reference grade, musical rich immersive and less clinical than german variety
grail rated balance and lively sound reproduction, revealing expansive sound stage and detailed holographic imaging
the crown jewel of any audiophile collection especially for expansive vocals, sublime 3d presence and lush resolve
this 'dutch house' sonic aftertaste is revered worldwide for its cymbal-style dazzling resonance and warm depth
subtle tone coloring adds dimensionality, a top ranked upgrade for stereos, preamps, rode k2 ntk mics + more
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fully tested for gm conductance 101/99 % mutual gm (65 % good) very nice balanced triodes
our unique mutual gm output test applies 225 vdc simulating actual circuit operations w/ filtered dc!
all tubes also undergo an important life test pass, a key longetivity indicator
mutual gm scores = current transfer ability, especially important for push pull amps
also twice tested for unparalleled accurary! via legendary tv7/hickok 539c
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full sound auditioned w/ closed back high resolution monitors and aira preamps for noise and microphonics
give 100+ session hours w/ your specific amps voltage to fully cure (break-in is important)
ships well packed worldwide, includes amperex box + free postage
~authentic vintage hifidelity audio curation by caliacoustics~
check out our official site! reserve/request options, true-nos sealed-box rarities, and limited run special editions