I got mine for the same reason, 10 second change over if my tecamp goes down. The Elf is loud enough, any louder and it will just be backline with a PA, I don’t play those gigs generally. It doesn’t sound like an 80s Trace but judicious play with the eq will get you close enough if you are playing an active. I like the HA3500 comparison, I played one of those for years.