Johan Segeborn | 6 years ago
According to a recent study, 20W Greenbacks from after 1968 are most likely 25W labelled as 20W, but they're not intentionally fake. Check out the article at Bygone Tones: http://www.bygonetones.com/20-watters-explained.html
In this video I compare two confirmed (1966 and 1967) G12M20 speakers to G12M25 and ‘G12M20’ from after January 1968.
