Properly executed EQs, including Dirac Live, require headroom to boost certain frequencies without exceeding 0dBFS and causing digital clipping. The output level is attenuated to provide headroom, and you may need to increase the volume higher than usual. Some manufacturers might apply gain compensation, which could change with different options/modes. Ensure the measurement volume is the same or slightly higher than the listening volume. Learn more here: https://en.wikipedia.org/wiki/DBFS