Description: 【3 Amplifier In 3 Speaker Out Selector】3 amplifier In and 3 speakers out selector, 3 position rotary mechanical switch, when the power amplifier is playing, you can choose the rotary switch to select 1 of the speakers to play music. 【300W Maximum Support Power】3 power amplifier rotary gear switch selection switch input, 3 sets of stereo speakers with rotary gear switch to select switching output. The maximum support power of each channel is 300W 【Plug and Play】The input and output of the switcher all use standard red and black banana connectors, which can be plugged in and used directly without power supply. 【Metal Case】The casing is made of iron metal material, and the compact size,easy to install,and you can enjoy a different audio experience 【Wide Compatibility】 Input and output are manually selected and switched, plugged in and used directly, the switching signal is stable, and there will be no interference or noise between channels.compatible with all types of power amplifiers and speakers. Specification: Channel power: each channel supports a maximum power of 300W Input channel: supports stereo input of 3 power amplifiers (does not support 5.1, 7.1 power amplifiers) Output channel: support 3 pairs of passive speaker output Input and output switching: switch with 3 levels rotary mechanical switch Frequency response: 10Hz -50KHz Output impedance: 4~16 ohms Input and output interface: standard red and black banana head interface Appearance material: metal iron shell Power supply: no power supply, direct plug and use Size Chart: Lengthxwidthxheight 24cmx9cmx5.5cm/9.45inchx3.54inchx2.17inch Package Includes: 1 Piece 3 Amplifier In 3 Speaker Out Selector Note: Please allow slightly errors due to manual measurement and different monitors.