In connection with the newly launched Totaldac d1000 speakers, here are the measurement graphs. In room frequency response (measured in Totaldac auditorium, using a Clio system, speaker close to a corner, microphone 40cm from the speaker, microphone between the midrange driver and the tweeter, 10 degree angle, unsmoothed curve):

Free field bass response (measured outdoor far from any wall, speaker standing on the ground, using a Clio system, microphone 1m from the speaker, unsmoothed curve):

The small drop at 160Hz is just due to the floor reflecting the wav to the measurement microphone.