I used this wire to make a quad cable for bi-wiring speakers. The result is very good. To my ears this wire carries a highly detailed and transparent sound. Unsurprisingly, the mids and highs are very clear and detailed. I even used them for the low-pass connectors, as electrical symmetry is important in my experience. The bass is very detailed and true to the recording. If the recording has high bass levels, so does the speaker with this cable. (I needed to play the system with this new cable for about a week for the sound to settle in.)
My preferred speaker cable used to be unplated single core copper, for the transparency and transient delivery. The only draw-back with that is a roll-off in the high frequency band. This Audiophonics cable is the first thing I've found that has the same transparency and attack but with better frequency extension.
The strengths of this cable is particularly evident when playing recordings of instruments with a great range, such as piano or cello. All the notes have a similar sound signature in terms of resulution and sound presssure. This provides a very stable spatial reproduction.
I will definitely be making more speaker cables from this wire.