the top sonic echelon, rare direct japan import '63 matsu audio tube, phenomenal extended tone, fan favorite mullard altv.
the limited run (special leaf-spring-getter white-tip) has later breakup than mullard and more clarity up top w/ less noise
they are also popular for amps that are tough on tube lifetime, especially e88cc/6922 which can fail fast depending on load
an audiophile sought after tube, these have more upper register detail reveal w/ incredible low-register warmth and presence
the sound stage is large euphoric and expansive highlighting more nuances, precise pin-point bass, a sweet yet clear resolve
add fidelity + musicality w/ a dazzling rich tone for preamps / stereos / tube mics... try them in any ecc88 ready position today
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nationals are revered worldwide for their hard vacuum, tone quality, longetivity and pure uncolored sound reproduction
the british supplied expertise and tooling via 'transfer of technology' resulted in several critical audiophile advantages:
same anodes, micas, electrode geometry, glass envelope, spot welding, grid wire spacing and cathode processing chemistry
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7dj8 also offer more head room, better low-bass kick, and extended upper frequency detail due to their linear .3a constant design
often compared to comprehensive 7308 stages, 7dj8 are revered by audiophiles worldwide for their lively transparent energy
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full conductance test, nice balance 124/120~115/120% mutual gm (65%) +useful life test pass! (key longetivity indicator)
our unique gm output test applies real world circuit voltages and has an impeccable gas short and leakage test
mutual gm conductance is the ability to transfer current, especially important for push-pull preamps
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finding an audiophile grade 6dj8 can be daunting! most sellers don't check for phono-level noise or mic-certify them
we also pride ourselves on a proprietary value-added complimentary complete refurb screening + deox process
full studio sound auditioned w/ ultra high-res closed-back monitors and premium aira preamps
give 100+ session hours w/ your specific amps voltage to fully settle in (break-in is important)
ships well packed worldwide w/ new plain or fragile branded box (depending on stock available)
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vintage authentic hifidelity audiophile / preamp / tube mic curation by caliacoustics
see our official site! for rarities and reserve/request options, new part number list below
including limited special editions + rare true-nos sealed box + pinched waist
also high-resolution headphones + premium vocal stage and studio mics
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6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cca
12ax7 12at7 12au7 12bh7 / ecc83 ecc82 ecc81 e82cc
6bq5 6au6a 6267 6ca7 6ca4 6aq5 / 6v6 6l6 6sl7 6sn7 5y3 5u4 5ar4
5814 5751 5965 6189 6201 7062 7189 / cv2492 cv4004 cv455 cv4085
el34 el84 ef86 ef94 ez81 ecc85 e180cc e80cf gz34 (ef804 soon)