The DeVore can do bass nicely but its important to keep in mind the speaker is not designed for a tube amp with a higher damping factor. At shows DeVore is often seen using an SET with no feedback which has a lower damping factor. He is relying on this for the speaker to make bass properly.
This is why some higher powered amps might not be ideal on this speaker. Its not the power that's the issue- its the fact that the speaker is not meant to be heavily damped by the amp.