Description
(!!!!!) (Best Overall Single) JAN-5691 Sylvania black plates NOS 1977 (2.8/3.1mA) (Same Gm) (Best 6SL7GT sub) (same internals as 5691 red base)
1 low noise tube) JAN-5691 Sylvania black plates NOS 1977
2.8mA Gm=1800
3.1mA Gm=1800
– very good detail
– low noise
– reference tube
Good mA range 2.0mA+
Good Gm range 1500+
Recommended for
– Ampeg Heritage B-15
– Alessandro Itallian Greyhound jazz amp
– Alessandro Black and Tan 2005
– Almarro A318B
– Eddie Current