Description
(!!!!!) (BEST QUAD) JAN-6550A GE NOS 1985-1986 (138.8ma, 139.2ma, 139.4ma, 139.5ma)
1 matched quad) JAN-6550A GE NOS original boxes 1980’s 1-2% matched
1 tube) 138.8ma Gm=11,800
1 tube) 139.2ma Gm=11,650
1 tube) 139.4ma Gm=11,250
1 tube) 139.5ma Gm=11,750
Matched on Amplitrex
Good NOS Ma range 120-140ma
Good NOS Gm range = 10,000 – 11,000
(warm and punchy midrange, good bass, a very good 6550 second only to Tungsol 6550 in overall sound and drastically superior to Svetlana or Sovtek 6550)
– ARC VT60, ARC VT100 MarkII and MarkIII, Ref. 300, Ref. 600
– Audio Research Reference 3 line-stage power supply
– Luxman
– Rogue
– Cary
– VTL MB300, MB450, ST-150
– CJ Premier 8 and 11A, 12
– Jadis
– Ampeg SVT
– Comins Alessandro Jazz Guitar Amp
– Cary SLI-80
– THD
– VAC PA100/100
– McIntosh 275 MK IV 2005
– Harmon Kardon
– Audio Aero Capitole Integrated amp
