The Kanta 3s use flax for their mids and woofers…are closed in the back
3-WAY FLOOR STANDING LOUDSPEAKER
Kanta N°3 is the reference product for the line: this Hi-Fi loudspeaker superbly combines depth, impact and articulation of the bass register. The definition and neutrality of the midrange are incredible. The next generation IAL tweeter reproduces the tiniest details with clinical precision. The result? A precise, detailed sound, brimming with warmth and musicality. It is the start of a new era for those who love sound…This acoustic masterpiece performs at its best in large rooms, from 430 to 860 ft² (40 to 80 m²).
Entirely dedicated to acoustic performance and with an incredibly original look: that, in a nutshell, is the Kanta DNA! After three years of research, Focal offers a new combination of exclusive Hi-Fi technologies: the marriage of Beryllium, in the next generation IAL3 tweeter , and Flax , for the midrange and bass speaker drivers.
Another strong point of the line is its bold look that puts the finishing touch on this acoustic masterpiece with a resolutely modern and bewitching design! With its front panel finishes, gloss or matt, there are several possible combinations. Different styles, each one so different from the next, means there’s something for everyone. Kanta has become a ultra stylish, designer object that will become the star of your interior.
While the Sopra 3 is open behind the tweeter…giving a dipole
effect …and employ a slate composite on their mid and woofers
GENEROUS & CONTROLLED
3-WAY HIGH-END LOUDSPEAKER – 2 WOOFERS 8¼” (21CM)
The longest standing loudspeaker of the line, Sopra N°3 perfectly combines dynamics, space optimisation and harmonic richness.
With its two 8¼" (21cm) woofers, this loudspeaker offers solid, rich and perfectly defined bass for music lovers looking for optimum performance. Despite its reasonable size, it will reveal its full potential in rooms measuring up to 860 ft2 (80 m2).
Sopra clearly inaugurates a new era for the “Premium High End” by taking into account new performance criteria. Compact, modern, a pure design, character… all these are essential factors to ensure perfect integration into your interior.
Equipped with best midrange drivers ever developed by Focal, with the NIC and TMD technologies, Sopra pushes back the limits of sound reproduction in terms of transparency in a very compact enclosure. Indeed, unlike Utopia, which is extravagant by essence and where size is by no means a constraint, Sopra aims for maximal compactness to ensure easy integration into reasonably sized rooms.
Both Kanta and Sopra employ be tweeters.
Hope this helps answer your question regarding the differences
between the Kanta 3 and the Sopra 3