2-IN-1-OUT Amplifier/Speaker Selector:Designed for audiophiles with multiple audio sources, this premium switcher gives you complete control over your sound system setup with flexible connectivity options Dual Connection Modes: ① Connect 2 AMP to AMP 1/2 ports and 1 speaker pair to Speaker port (2 amps→1 speaker) ② Connect 1 AMP to Speaker port and 2 speaker pairs to AMP 1/2 ports (1 amp→2 speakers).Note: Only one input can play at a time Plug and Play: No Power required.Enjoy pristine, unpowered switching that preserves your original sound quality. The intuitive A/B button provides instant source/speaker switching Professional-Grade Construction:Features premium gold-plated banana jacks accommodating up to 12-gauge wire, with heavy-duty UL1007 18 AWG internal wiring for superior current handling (100W RMS/200W peak per channel) Universal Compatibility: Works seamlessly with most amplifiers and passive speakers, making it ideal for sophisticated home audio systems and professional setups alike Description: This switching box works for either two amps connected to one set of speakers, or two speaker sets connected to one amp. You can select only one position at the same time. How to Use: 2 AMPs switch: it work to accept two amplifiers or receivers to share use of one pair of loudspeakers through the toggle switch on the front (Switch AMP/A or AMP/B) on this way you can quickly compare 2 amps, A/B test them without having to make long pauses for switching the amps off, disconnecting speaker wires from one amp and connecting them to the other amp 2 pairs speakers switch: it work to accept one amplifiers or receivers to switch two pairs of loudspeakers(Note:this way is switch one pair loudspeaker A or loudspeaker B work,They don't work at the same time ) This is a good idea to solve the problem of unplugging and plugging the speaker wires. Features: No power supply and other software required; plug and play. Compact easy to place and suitable for your desktop and office. Switch has a sturdy construction, all metal,beautiful appearance and reasonable design. IN/OUT ports through the high quality golden plated banana jacks, which can accept up to 12 gauge wires. The internal connection wire uses UL1007 18 AWG wire, which is enough to pass high current. Specification: Color: Black Switch: 5A current shock switch Super small size: 140 * 90* 40mm Weight: 400g Package contains: 1X Amplifier/Speakers Selector Switch 1X User manual