There are two philosophies surfing arround this area:
One of them CABLES DO MAKE A DIFFERENCE and
the other CABLES DO NOT MAKE A DIFFERENCE.
If you believe into the second philosophy than it doesn't matter. Zipcord is fine all the way through without any research and spending money for AudioQuest or Kimber.
If you believe in to the first than you should have cables of the same brand preferably even of the same length if such possible or the length difference must be minimal.
As far as I understand to sell just only one speaker cable is much more difficult than to sell a pair of equal-length speaker cables.
P.S. You can use different brands at once per one channel when you biwire or biamp.
One of them CABLES DO MAKE A DIFFERENCE and
the other CABLES DO NOT MAKE A DIFFERENCE.
If you believe into the second philosophy than it doesn't matter. Zipcord is fine all the way through without any research and spending money for AudioQuest or Kimber.
If you believe in to the first than you should have cables of the same brand preferably even of the same length if such possible or the length difference must be minimal.
As far as I understand to sell just only one speaker cable is much more difficult than to sell a pair of equal-length speaker cables.
P.S. You can use different brands at once per one channel when you biwire or biamp.