I got exactly what you describe (increased image height) by going from TQ Black to TQ Ultra Black speaker cables recently (see my other thread).
Devialet 220 Pro, TQ Black Mains & Ultra Black Speaker Cables, Naim Ovators S600, Sonore microRendu (Roon & HQP) with Uptone JS-2
TRNC (North Cyprus)
TRNC (North Cyprus)