subtle detailed harmonic layering produces a smooth stage compression w/ an incredibly intimate vocal frequency response
like a live concert in your living room, telefunkens liquid transitions are a touch more popular than siemens for good reason!
the high quality ef804 for professional recording audio, featured in v72 v76 v69 mics, rohde, schwarz, and aeg magnetophones
the revered telefunken low noise floor is so quiet which is why these were popular for siemens v77 / klangfilm / neumann studios
this gabl special selection marked telefunken was bundespost german telecommunication screened for its quality and longetivity
lore also tells us this tube features special cathode internals w/ long 10k hour lifetime, collectible 1959 production
thick hollow getter and <> diamond bottom from 1959, ulm code build print of u4109710
rated at 3.3mawhere 3ma is 100% via digital roetest, and includes original ef804 telefunken box
twice tested, full conductance test 90 % mutual gm (65 % good)+ useful life test pass! a key longetivity indicatorour special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test and leak/short check
our tubes also undergo a proprietary value-added complimentary refurb and deox screening process, one of a kind qc
give several sessions or up to 100+ hours w/ your specific amps voltage to settle in (break-in is important)ships fast well packed worldwide + free economy postage and old telefunken box
authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics
see our official site! reserve/request options, new arrivals, limited special editions
+ rare true-nos sealed box + pinched waist + high-resolution headphones