4 Input 2 Output or 2 In 4 Out Power Amplifier Speaker Selector Switcher Do you have 4 power amplifiers and 2 sets of speakers that need to be connected to get stuck? Do you need 2 amplifiers and 4 groups of speakers to choose from? A Powerful power Amplifier Selector Switcher Can Solve the above Problems, 1. 4 power amplifier gear switch rotary selection switching input, 2. Groups of stereo speaker gear switch rotary selection switching output, the device supports two modes of use,forward access 4 power amplifiers and 2 groups of speakers, reverse access 2 power amplifiers and 4 groups of speakers. 3. Can use banana head interface or can accept up to 12 AWG speaker cable. Fully compatible with all types of amplifiers and speakers. 4. Headset 6.35mm interface provides stereo headset output, for personal listening signal monitoring, headset output independent volume adjustment. 5. Support 4 to 16 ohms impedance stereo speakers, each channel support power up to 300W 6. Input and output manual selection switch, direct insertion and direct use, switching signal is stable, there is no other interference or noise between channels 7. Compact design solid metal shell, easy installation, the product does not need external power supply 8. Simple installation: input and output plug and play easy installation, you can enjoy a different audio experience Product parameters: 1. Material: Metal iron shell 2. Compatible with all types of power amplifiers and speakers. 3. Inputoutput accepts heavy speaker wire or speaker pin wire through the terminal port. 4. Connect the power amplifier to amplifier 1-2-3-4. 5. Connect speakers to speakers A and B respectively. 6. Turn on your power amplifier stereo device and the product requires no external power supply. 7. Inputoutput: 4 sets of input 2 sets of output (banana plug) 8. Metal material, steel casing, compact size to fit any system. 9. Channel power: Each channel supports power up to 300W. 10. Net weight: 0.85kg 11. Weight including