(!!!!!) (BEST QUAD) JAN-6550A GE NOS 1985-1986 (132.5ma, 132.2ma, 133.2ma, 134.4ma) 1-2% matched
1 matched quad) JAN-6550A GE NOS original boxes 1980's 1-2% matched
1 tube) 132.5ma Gm=11,300
1 tube) 132.2ma Gm=11,300
1 tube) 133.2ma Gm=11,150
1 tube) 133.4ma Gm=11,300
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 (132.5ma, 132.2ma, 133.2ma, 134.4ma) 1-2% matched&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/6550agequad1b.webp?v=1673407619){kind=link}
 (BEST QUAD) JAN-6550A GE NOS 1985-1986 (132.5ma, 132.2ma, 133.2ma, 134.4ma) 1-2% matched "Pin It")