The Armour range of high performance cables and adaptors are suitable for guitars, microphones, audio equipment and speakers and represent great value with sound performance. The SJP30 30 Foot High Performance Speaker Cable with 1/4 Jumbo Metal JACK To 1/4 Jumbo Metal JACK is designed to work with most PA Speakers and Power Amplifiers. Its over sized connectors and thicker cable gauge gives you better reliability with tremendous value.