When you want to compare Valhalla with Siltech SQ 188. you must be joking. I did a lot of testing with Siltech cables. Siltech is filtering an important part in the mid freq. When you use Siltech you will also lose a lot of depth information. When you have the change to compare them both you will hear that a Valhalla is superior than a Siltech. Yess so big is the difference. I did a few times the comparison between the Valhalla powercable and the Siltech Ruby mountain Hill. The Valhalla was every time superior. So much more resolution, low freq. are better focused and there is so much more air between every part of the recording. People have to compare more and better between brands.