How long should it take to break in Kharma Cables


I recently purchased the Kharma Grand reference speaker cables (2 meters). The system now sounds a good deal more bright and tinny sounding. I have already played music throught them for 30 hours.
henry_10023
Lamm ML2,
Kharma Reference 3.2,
Conrad Johnson Premier 15
Lamm LP2
Basis 2001 with Grahm 2.2 and Ruby 2
Rega Jupiter
Dedicated Lines, P300 Power conditioner on source equipment
Interconnects: Synergistic Looking Glass
As learned here lately on the burn-in posts, 200 hours or more especially if they are silver cables. Both my Pure Note and Siltech cables sounded thin until 200-300 hours. I know people don't like to wait but that is the "nature of the beast."