Why on earth have you restricted yourself to only these two polar opposites?
You've got very different aesthetics being presented. The aluminium the Kef driver is composed of never really goes away as a slightly astringent colouration (despite Kef's claims) & the C4s can easily go too far in the opposite direction. There are plenty of sweet spots between the two for you to consider - that cry out to be. This Magico with an asking (Its the second time on AG & a lower price is certainly obtainable) of almost identical to the retail of the C4 platinum but with no tax, is engineered to a far, far higher level. It was 90 K a decade ago & would be 6 figures plus now if new. >
https://www.audiogon.com/listings/lis9460g-magico-m5-speakers-full-range
It's a super & turbocharged version of what Dynaudio would've made with similar drivers if they had a Magico sensibility & cost no object approach.
The best reviewer at The Absolute Sound gave it the kind of review no Dynaudio would've received from him >
http://www.theabsolutesound.com/articles/tas-196-magico-m5-loudspeaker/
If you want metal drivers made with far superior materials instead - then Focals latest beryllium tweeters are a clearly superior way to go. Two choices available right now are -
https://www.audiogon.com/listings/lis9461b-focal-maestro-utopia-iii-full-range & for a huger savings -
https://www.audiogon.com/listings/lis93i6b-focal-sopra-n-2-full-range
You've got very different aesthetics being presented. The aluminium the Kef driver is composed of never really goes away as a slightly astringent colouration (despite Kef's claims) & the C4s can easily go too far in the opposite direction. There are plenty of sweet spots between the two for you to consider - that cry out to be. This Magico with an asking (Its the second time on AG & a lower price is certainly obtainable) of almost identical to the retail of the C4 platinum but with no tax, is engineered to a far, far higher level. It was 90 K a decade ago & would be 6 figures plus now if new. >
https://www.audiogon.com/listings/lis9460g-magico-m5-speakers-full-range
It's a super & turbocharged version of what Dynaudio would've made with similar drivers if they had a Magico sensibility & cost no object approach.
The best reviewer at The Absolute Sound gave it the kind of review no Dynaudio would've received from him >
http://www.theabsolutesound.com/articles/tas-196-magico-m5-loudspeaker/
If you want metal drivers made with far superior materials instead - then Focals latest beryllium tweeters are a clearly superior way to go. Two choices available right now are -
https://www.audiogon.com/listings/lis9461b-focal-maestro-utopia-iii-full-range & for a huger savings -
https://www.audiogon.com/listings/lis93i6b-focal-sopra-n-2-full-range