while all our open tubes feature a proprietary value-added refurbish, sealed box true nos are the rarest crown jewels!

direct germany import siemens e188cc (7308) preamp audio tube, very old '60s production unobtanium collectible

premium rugged 6dj8 6922 cca upgrade w/ added low-bass and peak fidelity for vocals and mics ~ the sonic top echelon

not to be confused w/ common production this is the warmest richest oldest most transparent holographic version ever made

give 100+ session hours w/ your specific amps voltage to fully cure

ships well packed worldwide, combined postage available, factory seal/staple intact never opened