I assume your speakers are NOT the bi-wire variety. What you can do is use an entire separate run of cable for each terminal on your amp and speakers. In other words, use one whole cable from the +(red) of the amp to the +(red) of the speaker; then -(black) to -(black), etc, etc. (A separate whole cable per speaker and amp terminal equals 4 pieces.)
If you have bi-wireable speakers and never have done it; then remove the jumpers on the speakers, and use two cables from the amplifier per channel to each pair of speaker terminals.