“The new line-up performed at the 1972 Reading Festival. Barcus Berry instrument pick-ups, now sported by the band’s string trio, allowed them to have proper amplification on stage for their instruments, which had previously been all but drowned out by all the sound of the electrified instruments. The band released their second album, ELO 2 in 1973, which produced their second UK top 10 and their first US chart single, an elaborate version of the Chuck Berry classic “Roll Over Beethoven”Wiki
Electric Light Orchestra – Roll Over Beethoven (Original Promo) 1973