The Model EJ-8L is a multi-input adapter that accepts any input signal unbalanced line level inputs from a wide variety of audio/video devices for input into an existing PA system,while providing the necessary matching, isolation and balancing for protecting the sound system. The EJ-8L also acts as a mixer when accepting signals from more than one source at the same time. line level output The EJ-8L is similar to the EJ-8 except it has line level output instead of mic level output. The EJ-8L comes with everything required to connect virtually any audio source to the line level input of an existing sound system. wide frequency range & stronger The EJ-8L is a completely passive device, no batteries or output signal external power sources are required for operation. The EJ-8L features a volume control, phone and phono jacks, binding posts, and a hum switch. An assortment of interconnect cables and a nylon carrying case come attached to the EJ-8L. A complete instruction manual no external power comes stored in a pocket of the carrying case.