Why do my speakers lack bass?

The speaker may appear to lack in bass output if the bass management filter has accidentally been applied.

On the rear-panel controls navigate to the Subwoofer HPF/LPF Enable page and set it to OFF:

Or, in the SoundAlign interface open the info box for the speaker in question, where the status of the bass management filter will be displayed:

If the bass management filter is active, disable it via the radio button on the SoundAlign main window: