In this video I compare the rather unusual Greenback version that Tony Iommi of Black Sabbath used in the 1970s; the T1976 G12H30 75Hz to one of the standard Greenback models; a T1281 G12H30 55Hz that was used by Jimmy Page, Jimi Hendrix, Kiss and many more!
So T1976 vs T1281!
Gear:
1971 Celestion G12H30 55Hz T1281
1972 Celestion G12H30 75Hz T1976
1973 Gibson Les Paul Custom
1976 Marshall Super Lead