Fischer Amps PLP, loudspeaker testing set, the optimal aid for the tone technician, fast testing loudspeaker systems without additional equipment, 1W power output at 4/8 ohms tunable sine wave 90Hz-9kHz, current supply with 9V-block batterie, switchable XLR output of asymmetrical on symmetrical, Speakon and XLR Output links, sturdy aluminum housing, high-grade steel belt mounting plate