ah...i found another pair of Straightwire Rhapsody which is exactly the same lenght and quality from the one i have. So i'm going to bi-wire it.
Last night i tried different jumpers (diy) and I didn't like the sound . It's bottle neck , period. Then i tried to biwire to upper end with the Canare and the high is harsh. But when i switch Straightwire to the upper end, the high is clearer and smooth. So I end up getting another pair of Straightwire , of course used...

I'll post the review once i get it.
By the way, i don't like the sound from silver cable at all as i made two pairs of jumper from the silver wire which my i got it from my friend.