Speaker cables have only one golden rule, buy the thickest cables you can afford. Speaker cables depend of the individual wires within the cables to transfer information. The thicker the cable the more information transferred which results in a superior sound from your speaker. Be sure to look at your speakers and the sound source to determine the type of connection you need at each end of the cable. There are direct wire connections and plug-ins. Another very important factor to consider is whether the calbes will be installed behind your walls. If that is the case you must buy cables approved for that use since there is a fire hazard. You should measure and determine the length of cables you need so you are not paying for more than you need.