kaso sir the 9 series has the curved MDF cabinet even for the centers versus the straight box cabinet of the 8 series... may effect kaya ito?
In my observation, wharfedale Diamond series always copied the technology of B&W speakers, no wonder they call them "Poor Mans B&W". In their latest 9 series model it almost like the 800 series of B&W (Nautilus) the idea of no 90 degrees corners improves the imaging just like the cone of speakers.
"It avoids the situation with normal cabinet construction, where sound waves from the tweeter not only radiate towards the listener but also travel along the baffle surface towards the cabinet edges. When they meet the sharp cabinet edges they re-radiate (a process known as diffraction) and, due to the time delay, interfere with and time-smear the sound coming directly from the drive unit. The effects of this improvement in time-coherence are greater clarity and the formation of a more convincing three-dimensional image. "
I had a chance to have both Diamond 8.3 & 8.4 when I heard the 9 series i find it more refined & better soundstage. Not to mention the new driver of 9 series are solid cast aluminum compared to 8 which is just a sheet of metal.(IMHO)