2 Matched PQ 6922⊿ Heerlen Holland DGetter ~ 1959 SameCode 7L4 HolyGrail Amperex ~ High Resolution Warm Bass Lush Dutch House Imaging Linear Holopgraphics ~ Rode K2 NTK Preamp Stereo HiFi

the legendary amperex heerlen sound stage is harmonically rich, lush transparent imaging and phenomenal vocal intimacy

these top sonic echelon limited-run 1959 pq dgetter editions are very hard to find and capture a luminous mid-band warmth

this expansive euphoric sound stage is incredibly expansive, highly musical and features the dutch-house sparkley resolve

this cymbal-style sonic aftertaste is revered worldwide, and provides more intimate depth for percussion and instruments

these are the closest sonically to 7l4 pinched waist variety w/ a touch more tone body and subtley less 3d airy ambience

the breath of life, 6922 holland are quite rare w/ the most precious quality metals of the tube-era, no comparison to later types

these long life 10k hour build types are a premium 6dj8 upgrade w/ more extension and live-concert holographic extension

authentic holland same exact etch codes 7l4⊿ 9k / 7l4⊿ 9k, phenomenal 1959 production w/ nice pq shield logo silkscreens

all tubes are twice tested, sound circuit studio auditioned, and include authentic philips amperex boxes

full conductance test balance 90/90 ~ 94/96 % mutual gm (65%) + useful life test pass! (key longetivity indicator)

our unique gm output test applies real world circuit voltages and has an impeccable gas short and leakage test

mutual gm conductance is the ability to transfer current, especially important for push-pull preamps

finding an audio grade 6922 can be daunting! most sellers don't check for phono-level noise or mic certify them

we also pride ourselves on a proprietary value-added complimentary complete refurb screening deox process

full studio sound auditioned w/ ultra high-res closed-back monitors and premium aira preamps

give 100+ session hours w/ your specific amps voltage to fully settle in (break-in is important) ~ ships well packed worldwide