There are at least two bands called "BoomBox". Information about the Ukrainian band Boombox can be found under its name in Cyrillic: Бумбокс. This page is dedicated to BoomBox from the United States.
These are photos from concerts where Boombox played, so they may be of other bands that played the concert as well.
High Sierra Music Festival 2022 Jul 2, 2022 Quincy, CA, US Uploaded by Joyfuljellyphish