The Tephra™ speaker cable has been created based on years of customer feedback from several different speaker cable types – combining the best features of these. Tephra™ speaker cables are constructed using a proprietary 8 conductor wire (4 each 18 AWG, 4 each 20AWG) combined to create a high fidelity 13 AWG assembly, featuring foamed PE dielectric and stranded copper conductors that significantly enhance guitar amp speaker performance and tone. With a thick outer jacket, it is built for the rigors of stage use and to be extremely durable. Like actual Tephra from a volcanic eruption, rigs using the Tephra speaker cable will explode with bigger, fatter, and better tone.