full mutual gm conductance test, several pairs in stock:
pair1: 81/80~85/80 % gm ~ pair2: 76/75~75/74 % gm (65 % min good)
pair3: 84/74~72/82 % gm ~ pair4: 71/70~72/70 % gm pair5: 80/80~80/80 (sold) % gm (65 % min good)
+ important life test pass (longetivity indicator) + plus an impeccable gas test / leak / short check
+ complimentary refurbish and deoxit process ~ one of a value added quality control
give several sessions or up to 100+ hours w/ your specific amps voltage to settle in / break-in
ships well packed worldwide w/ free economy postage!
~ authentic vintage hifidelity audio / power / preamp / mic tube curation by caliacoustics ~
see our official web site for new arrivals + reserve/request options + true-nos sealed box rarities
+ limited run special editions + pinched collectibles + high res headphones