The term 'BAND DEVICES' can be broken down into two crossword solutions: AMPS (4 letters) and DRUMS (5 letters). Amplifiers, or amps, are electronic devices used to increase the volume of an audio signal. They are commonly used with electric guitars, bass guitars, and other instruments in a band setting. DRUMS are percussion instruments that are also commonly used in bands. They are played by striking the drumhead with sticks, mallets, or hands.