illuminate your sound system w/ 6201 gold pin mullard, premium upgraded vintage british ecc81 12at7 preamp tube
this rare revered 1964 audiophile crown jewel has a holographic rich sound stage and fuzzy tweed harmonic warmth
carefully curated + twice tested w/ mullard box included, authentic r4f3 mitcham gt brit build code
~
full gm conductance test
118 / 114
% gm
(65%)+
life test pass!
(a life check = key unique feature other testers lack)
our mutual gm output run applies
real world
225vdc voltages w/ filtered dc + an impeccable gas test + leak/short check
we pride ourselves on a proprietary complimentary
value-added
complete refurb screen and deox process
also check out our official site! new part numbers including true-nos sealed-box rarities, and
reserve/request options
give 100+ session hours w/ your specific amps voltage to settle in (break-in is important)
ships well packed worldwide ~
authentic vintage hifidelity audio curation by caliacoustics