^^^
I used my Onkyo with now out-of-production Mirage OMD-15s, which had dual woofers augmented by a passive radiator and a port. The Onkyo controlled this setup very well, while conveying the midrange and treble with transparency without harshness. I can definitely see where Wharfedale Diamond towers would be a good match, and as you say, could provide a fuller sound than the small Focal floorstanders.
I used my Onkyo with now out-of-production Mirage OMD-15s, which had dual woofers augmented by a passive radiator and a port. The Onkyo controlled this setup very well, while conveying the midrange and treble with transparency without harshness. I can definitely see where Wharfedale Diamond towers would be a good match, and as you say, could provide a fuller sound than the small Focal floorstanders.