Amazon.com: Hosa NA4LJX Neutrik Speaker Adaptor, 1/4 in TS to speakON : HOSA: Electronics
Amazon.com: Neutrik Panel Mount Speakon Jack NL4MPR : Electronics
Amazon.com: Qty 2 x 6m Neutrik Speakon Cable - NL2FC to Male - 2 Pole : Electronics
Amazon.com: D'Addario SpeakOn Speaker Cable - Neutrik Connectors - Maximum Signal Transfer and Flexibility - Copper Conductors - Limited Lifetime Guarrantee - 5 Feet/1.52 Meters - Max Signal Transfer - 1 Pack : Musical Instruments