(!!!!!) (BEST QUAD) JAN-6550A GE NOS 1985-1986 (140.0ma, 140.6ma, 141.0ma, 141ma)
By Tube World
1 matched quad) JAN-6550A GE NOS original boxes 1980's 1-3% matched
1 tube) 141.0ma Gm=11,650
1 tube) 140.0ma Gm=11,050
1 tube) 140.6ma Gm=11,100
1 tube) 141.0ma Gm=11,450
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 (140.0ma, 140.6ma, 141.0ma, 141ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/6550agequad1b_a3acf815-84bd-464d-b390-4a1d816ab119.jpg?v=1624364119){kind=link}
 (BEST QUAD) JAN-6550A GE NOS 1985-1986 (140.0ma, 140.6ma, 141.0ma, 141ma) "Pin It")