Final answer:
The electric guitar solved the problem of inability to produce loud volumes for Swing Era guitarists.
Step-by-step explanation:
The electric guitar solved the problem of inability to produce loud volumes for Swing Era guitarists. During the big band era, acoustic guitars struggled to be heard over the large ensembles. The electric guitar, by incorporating electromagnetic pickups, allowed guitarists to amplify their sound and hence be heard alongside other loud instruments like brass and percussion. This was critical in ensemble settings and larger venues where the natural projection of the guitar was not sufficient. The electric pickups on a guitar convert the vibration of the strings into electrical signals, which can then be amplified through speakers, producing a much louder sound without losing tone quality.