1、【Versatile Amplifier and Speaker Switch】: This powerful amplifier and speaker switch can solve your connection problems. It supports two usage modes: forward connection with 4 amplifiers and 2 sets of speakers, or reverse connection with 2 amplifiers and 4 sets of speakers. 2、【High Compatibility】: Our device is fully compatible with all types of amplifiers and speakers. It can accept heavy-duty speaker wires or speaker pin wires through the input/output terminal ports. It supports stereo speakers with an impedance of 4 to 16 ohms. 3、【High Power and Quality Sound】: Each channel supports a maximum power of 300W, ensuring high-quality sound without any loss. The switch signal is stable, and there will be no interference or noise between channels. 4、【Easy Installation and Use】: The compact design and sturdy metal shell make installation simple. The device is plug-and-play, meaning you can enjoy a unique audio experience with easy installation. There is no need for an external power source. 5、【Personal Listening and Monitoring】: The device includes a 6.35mm headphone jack for stereo headphone output, allowing for personal listening and signal monitoring. The headphone output has an independent volume adjustment.