So it lacks bass after all?
The relevant measurement was posted exactly one page ago,
here.
I'll say this about bass, and I think this is something that a lot of people on ASR don't realize. Bass frequency response does not tell you everything. You also need to look at the time response, and the time response depends on your room. And maybe also your speaker.
Right now, I have 3 DSP filters and I am showing you the bass response. In
blue, we have the speakers high passed at 50Hz, and the subs low passed at 50Hz. In
yellow, the speakers are run full range, and the subs are low passed at 80Hz - meaning there is a substantial overlap between 20Hz - 80Hz that the subs and speakers are reproducing. In
magenta, the subs are off, and the speakers are run full range. I equalized all the bass response of each filter so that it is as flat as possible.
If we ignore the magenta curve (no subs) for a moment, you will see that the blue and yellow curves are almost the same. Maybe the yellow curve (speakers full range and subs low passed) has a little bit less bass. Not so, when you actually listen to the filter, the bass has a certain punch and impact which is more prominent than the other DSP settings.
The spectrogram tells you why. If you look closely, there is more energy between 40Hz - 90Hz on the spectro on the right - IOW the bass "hangs around" just that bit longer. This is enough to make the bass feel more powerful.
In my case, the difference was produced by different DSP settings / XO choices. But if those KEF's are placed in a "dry" sounding room, the bass will seem subjectively less, even if it has the same frequency response. The short message: the Klippel measurement tells you that KEF's are capable of producing bass frequencies. But the subjective experience of whether there is "enough" bass
also depends on bass decay, and bass decay depends on your room.
.
