revered by audiophiles, vintage tesla 6ca7 el34 feature rare special blue cobalt glass, limited run collectibles
known for their incredible sound reproduction,
this unique blue rf coating improves heat dissipation and tone purity
immersive vintage warmth, high fidelity expansive stage imaging and transparent live-concert vinyl style detail
all tubes are twice tested and sound auditioned... own a piece of history today, plain box included (branded box out of stock)
1 left: full conductance strong test 90 % gm (sold 100 % ~ sold 100 %)
+
life test pass!
(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
we pride ourselves on a proprietary complimentary value-added complete refurb screen and deox process
ships well packed worldwide
+ free postage!
authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics
see our offical site for reserve/request options + new arrivals +
limited special editions
+ rare true-nos sealed box + pinched waist +
high-resolution headphones