2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone

2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone
2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone
2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone
2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone
2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone
2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone
2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone
2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone

2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone

The top sonic echelon, 2 rare direct japan import'64 matsu audio tubes, phenomenal extended tone, fan favorite mullard altv. These limited run (special leaf-spring-getter) tubes have 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 large sound stage is euphoric and expansive highlighting more nuances, precise pin-point bass, a sweet yet clear resolve. Add fidelity to vocals and dazzling rich tone to your preamp / stereo / tube mic...

Try them in any ecc88 ready position today. 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.

Full conductance test nice balance. (65%) + useful life test pass! Our unique gm output test applies.

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. Finding an audiophile grade 6922 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). Vintage authentic hifidelity audiophile / preamp / tube mic curation by caliacoustics. For rarities and reserve/request options, new. Including limited special editions + rare true-nos sealed box + pinched waist. Also high-resolution headphones + premium vocal stage and studio mics.

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).


2 NOS Rare 1964 Matsu/Mullard Pre/AudioTubes 6DJ8 ECC88 HolyGrail OrganicTone