@rauliruegas The initial reason to check the frequency response of the speakers in question at my seating position was because its sound was somewhat agressive - particularly noticeable with massed strings as compared to my trusted Gallo ref 3.5. By using the DSPengine on my JRiver I could "rectify" this issue - but of course not for my analog inputs (hence the loki). I did measure the frequency response in various places (also 1m in front of one speaker - driven mono) and found the broad 6dB treble hump (with some variations) everywhere.
As indicated in my previous post - I hear advantages of using a coherent sound source >200Hz combined with DSP controlled subwoofers <100Hz. But this may just be my personal bias.
Experimenting with the Gallo subamp I could get a reasonaby flat frequency response 200 to 25Hz (< +/- 2dB) partly by using different phase shifts on the Gallo subwoofers.
I hope to join the Loki+ community shortly - trusting my subjective judgement augmented by unsophisticated measurements.