AR MS321 Masters Series 50ft 10 AWG Speaker Wire The precision-machined Acoustic Research MS321 Master Series 50 ft Speaker Wire Cable pair has 24k gold-plated AdaptaTips banana ends which ensure the tightest connection possible. Solder-free termination for maximum signal transfer and accuracy. Color-coded AdaptaTip design permits easy-to-connect, screw-on conversion from pre-installed banana plugs to optical spade connectors. Corrosion-free 24k gold-plated surfaces maximize audio signal transfer. 10 ga. alternating fine-stranded roped layers of oxygen-free copper and precious silver-coated oxygen-free copper for accurate reproduction of all frequencies. Contains 2 x 50 ft. speaker cables.