I'm a Kimber fan, but based on your equipment you are cheaping out on the cables. The 4TCs simply do not carry enough current for good top-to-bottom tonal balance. I can even tell the difference when using them as jumpers on bi-wirable speakers.
I agree with those who recommend at least 8TC; 12TC would be even better, but another alternative would be to get some Zu Libtec via Zu Cable's ZuPromos storefront. These are $500-600 cables selling at auction for $200-300, and include free shipping and Zu's full warranty and 60-day return period. The Libtecs are much better balanced and have a more complete bottom end than the 4TCs.
I agree with those who recommend at least 8TC; 12TC would be even better, but another alternative would be to get some Zu Libtec via Zu Cable's ZuPromos storefront. These are $500-600 cables selling at auction for $200-300, and include free shipping and Zu's full warranty and 60-day return period. The Libtecs are much better balanced and have a more complete bottom end than the 4TCs.