4pin pole female to 4pin pole female speakon coupler adapter a locking system of the speakon connector provides a good fit for soldered or screw-type connections.The contacts in the speakon connectors are arranged in two consecutive rings: the inner contacts are named +1, +2, etc., and the outer contacts are named −1, -2, etc.A bi-amping without two separate cables feature of the four-pole connector makes it the most popular and most commonly used among ready-made leads.4pin speakon coupler provides ideal connection between 2 cables or extend your existing cables.Features: connector type: female jack to female jack connects 2 speaker cables together nickel plated contacts finish: matt plastic