4 Rare DGetter Matsu/Mullard 12AT7 ECC81 NOS Holy Grail Audio Quad + OE Boxes

The top sonic echelon, dgetter assorted quad, revered tone w/ mullard tooling, 4. Old stock 12at7 ecc81 preamp audio tubes.

Incredibly rare late'50s production sought after by audiophiles for their high resolution and live-concert intimate warmth. The tube-era british supplied expertise + 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! 2 crimped angle getter + 2 90-degree getters.

Carefully curated direct japan import +. Take your listening experience to a higher level of 3-dimensional engagement w/ immersive holographic imaging.

These vintage types are also coveted for their warm live-concert style delineation of instruments vocals and percussion. Tune and transform your sound reproduction across multiple genres w/ more realism and delicate intimacy.

Our special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test + leak/short check. Mutual gm conductance scores are the ability to transfer current especially important for push-pull preamps. Also supplier double checked for conductance via supplier tv7 / hickok 539c for unparalleled accuracy. We also pride ourselves on a proprietary complimentary value-added complete refurb screening deox process.

Also see our new official site! True-nos sealed-box rarities, and reserve/request options. Ew updated part number list below.

Give 100+ session hours w/ your specific amps voltage to fully settle in (break-in is important). Authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics. 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 gz34.