Frequency response 26 Hz - 50 kHz.
They need to give more useful information, though. If not actual useful graphs, then at least a FR with some tolerance like +/-3dB or something.
Have you seen any graphs, FR, Polar response of this speaker?
I guess as long as they sound great, that is what matters most.
Or are you basing 100% on your hearing audition?
I suppose as long as they sound great, that is all that matters.