(!!!!!) (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
 (BEST QUAD) JAN-6550A GE NOS 1985-1986 (138.8ma, 139.2ma, 139.4ma, 139.5ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/6550agequad1b_a84ad488-18ec-4154-9b36-868849d000c9.jpg?v=1625693870){kind=link}
 (BEST QUAD) JAN-6550A GE NOS 1985-1986 (138.8ma, 139.2ma, 139.4ma, 139.5ma) "Pin It")