Product features: 1. 3 sets of balanced signal input, 1 set of balanced signal output 2. The switching switch adopts a three-position rotary high-contact, high-precision and reliable knob switch, ensuring lossless switching. 3. A non-short switching mode is adopted. It adopts the simultaneous switching mode of HOT and COLD. Note: All inputs and outputs of GND are universal. The LR of the input and output terminals is symmetrically configured on the left and right, and the LR of the internal wiring is separated on the left and right, with a L/R separation structure. Reduced mutual interference among . When switching the operation and rotating the gear switch, there be no popping sound, which does not affect the sound quality and ensures lossless transmission When used as a signal source device and a selector for amplifiers (preamplifiers) Input terminals can be connected to a maximum of 3 playback signal source devices. (2) The amplifier (preamplifier or preamplifier master) is connected to the output terminal COM. Note: Please do not mistake the L/R connection. 7. When used as a preamplifier, power amplifier or power speaker selector Input terminals can be connected to a maximum of 3 preamplifiers. (2) Connect the power amplifier or power speaker or active monitor speaker to the output terminal COM. Note: Please do not mistake the L/R connection. 8. Connection Example 1: Input 3 playback signal source devices and output 1 amplifier 9. Connection Example 2: Input 3 preamplifiers Output one power amplifier or power speaker or active monitor speaker Color: Black Material: Metal Package Contents: 1 x Audio signal selector switcher Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.