The elf is a loud 200 watt amp , however , it’s only a 200 watt amp.
But if it’s only an issue with one bass perhaps you should look at the bass first. Either raising the pickup or trying a pre should give you more signal. If the elf is not giving you enough presence using various basses , look at a more powerful amp.
… and the elf cabs are pretty tiny. You might need more substantial cabs as well. (it never ends)