Major development in sound and reach of Blues when it became possible to amplify the instruments of small combos.
Genre
Vermilion Sands 
Electric Blues
a sub-genre of: Blues
sub-genres: British Blues • Chicago Blues
see also: 
All Music • 
Discogs • everynoise.com • 
Freebase • 
Music Brainz • 
Rate Your Music • 
WikiData • 
Wikipedia
All Music • Discogs • everynoise.com • Freebase • Music Brainz • Rate Your Music • WikiData • Wikipedia