we pride ourselves on a proprietary complimentary value-added complete refurb screen and deox process, plus free postage!
also see our official site for discounts, new part numbers including true-nos sealed-box rarities, and reserve/request options
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old stock brimar gt britain 13d5, these are rare premium 12au7 ecc82 collectibles
very rare long plate edition! incredible sound stage clean top end w/ rich warm mids
revered worldwide by audiophiles, often compared to mullard, similar to cv4003 w/ more layers of delicate detail
1l1 / 1671 authentic british etch code w/ oe box included, carefully curated and twice tested direct import
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full conductance test nos % mutual gm (65%)+ life test pass! (life check = key longetivity indicator)
our special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test and leak/short check
gm scores relate to current-transfer ability, whereas gain relates to signal amplification ~ a difference based on actual voltages
give several sessions or up to 100+ hours w/ your specific amps voltage to fully cure (break-in is important)
ships well packed worldwide ~ authentic vintage hifidelity audio curation by caliacoustics